2015年4月7日星期二
熱風循環烘箱-烘箱的最新發展方向及性能簡介
隨著科學技術的發展和自動烘箱化程度的進一步提高，做爲實驗室的常用設備也在不斷的發展，由原來單一的産品逐漸向多個方向發展，比如數字顯示、電腦控溫、不鏽鋼內膽、真空烘箱等等。下面就目前市場上先進的烘箱給予簡單介紹。
一、不鏽鋼內膽烘箱
儀器介紹：
1。溫度範圍:高于室溫10°C到250或300°C。
2。。溫度範度:±0。2°C；溫度均一性:±2°C。
3。螺旋送風系統。
4。有自然對流和強制鼓風兩大。
特點：
1。內膽采用高品質不鏽鋼材料。
2。控制面板有兩種：標准型和舒適型，可編程序等等。
二、真空烘箱
儀器介紹：
1。最高加熱溫度爲280℃。
2。最大真空度可達762mmHg。
3。可注入氮氣或氦氣等惰性氣體。
特點：
熱風循環烘箱 不僅適用于普通烘幹，而且適用于真空灌封、水分測試、固化、調節及脫水等。
三、密烘箱
儀器介紹：
1。溫度範圍：室溫以上5℃-300℃。
2。熱對流。
3。溫度准確度：≤±0。3℃。
4。溫度均勻度：+/-0。8/2。0/3。7℃。
特點：
乾燥機 1。先進預熱爐腔設計。
2。具可調式溫度過熱保護裝置。
3。微電腦溫度控制器及數位式計時器。
4。微電腦多功能控制器，可社頂延長定時器、加熱速率、加溫功率、打印間隔等。
5。具有RS232接口，可連接打印機輸出報告熱風乾燥機。
隨著分析技術的不斷進步和分析儀器的不斷發展，烘箱和其他實驗室輔助設施一樣也要隨之不斷的發展。
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廠房通風-變頻調速技術在燃氣輸配系統正壓通風設備上的應用
對正壓通風機系統工藝現狀廠房通風及節能技通風設備術改造方案進行介紹，對安裝變頻系統進行了可行性分析、確定了易于實現最佳控制的變頻技術爲節能技術改造的最佳方案，介紹了安裝變頻系統後的技術特點、參數設定、系統操作等、並對應用效果及節能降耗進行論述分析。
對于煤氣系統來說，最大生産成本就是壓縮機及其附屬設備的耗電電費。節能降耗始終是煤氣系統的重中之重，統計表明，實際運行中，風機效率不足60％，存在著較大的能源浪費，因此在能源供應緊張的今天，如何運用節能技術，使用電設備高效運行，從而節約電動機的耗電量，對提高的經濟效益具有重大意義。
2、望花罐站正壓通風系統運行工藝及現狀分析
1．1、望花罐站正壓通風系統簡介：
(1)望花罐站加壓系統包括四台煤氣壓縮機：兩台2D12-200/1．5(2)型大型排風扇壓縮機和兩台2D8-120/1。5型壓縮機。主要作用是提高煤氣壓力和輸送煤氣。它們分別配套TDF500-12／1430的壓縮機電機和兩台TK280-12／1180的壓縮機電機，均爲通風防爆型。系統由兩台DW9—7 3型通風機提供風量主要爲了滿足壓縮機電機內部正壓防爆及電機冷卻降溫。
(2)正壓通風系統原理：空氣經過通風機加壓、過濾後，經通風管通過各個電機的風壓入口閥門進入壓縮機電機本體，起到保持正壓與降溫作用。並通過回風管收集熱風循環回風機入風口。
(3)兩台DW9—73型通風機，額定風壓爲1200Pa，分別配套16kw和14kw電機組成。電機額定電流爲23．5A，額定轉數1460rPm，風量分別爲30000m3／h和25000m3／h．根據原工程設計壓縮機工作時的工藝要求。280KW電機工作時要求正壓通風壓力500Pa，500KW電機工作時要求正壓通風壓力800Pa。
1．2、生産現狀；(與季節有關)
夏季一般爲一台280KW電機全天24小時運行，每天高峰期加一台280gW電機運行，加車2-3小時，此時一般爲一台風機24小時運行(風機負荷40％)，加車時風機負荷70％)
冬季一般爲一台500KW電機全天24小時運行，每天高峰期加車一台280KW電機運行，加車2-3小時，此時一般爲一台風機24小時運行(風機負荷66％)，加車時風機負荷55％)。
這種風機負荷率較低的現象，即“大馬拉小車”的現象。
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對于煤氣系統來說，最大生産成本就是壓縮機及其附屬設備的耗電電費。節能降耗始終是煤氣系統的重中之重，統計表明，實際運行中，風機效率不足60％，存在著較大的能源浪費，因此在能源供應緊張的今天，如何運用節能技術，使用電設備高效運行，從而節約電動機的耗電量，對提高的經濟效益具有重大意義。
2、望花罐站正壓通風系統運行工藝及現狀分析
1．1、望花罐站正壓通風系統簡介：
(1)望花罐站加壓系統包括四台煤氣壓縮機：兩台2D12-200/1．5(2)型大型排風扇壓縮機和兩台2D8-120/1。5型壓縮機。主要作用是提高煤氣壓力和輸送煤氣。它們分別配套TDF500-12／1430的壓縮機電機和兩台TK280-12／1180的壓縮機電機，均爲通風防爆型。系統由兩台DW9—7 3型通風機提供風量主要爲了滿足壓縮機電機內部正壓防爆及電機冷卻降溫。
(2)正壓通風系統原理：空氣經過通風機加壓、過濾後，經通風管通過各個電機的風壓入口閥門進入壓縮機電機本體，起到保持正壓與降溫作用。並通過回風管收集熱風循環回風機入風口。
(3)兩台DW9—73型通風機，額定風壓爲1200Pa，分別配套16kw和14kw電機組成。電機額定電流爲23．5A，額定轉數1460rPm，風量分別爲30000m3／h和25000m3／h．根據原工程設計壓縮機工作時的工藝要求。280KW電機工作時要求正壓通風壓力500Pa，500KW電機工作時要求正壓通風壓力800Pa。
1．2、生産現狀；(與季節有關)
夏季一般爲一台280KW電機全天24小時運行，每天高峰期加一台280gW電機運行，加車2-3小時，此時一般爲一台風機24小時運行(風機負荷40％)，加車時風機負荷70％)
冬季一般爲一台500KW電機全天24小時運行，每天高峰期加車一台280KW電機運行，加車2-3小時，此時一般爲一台風機24小時運行(風機負荷66％)，加車時風機負荷55％)。
這種風機負荷率較低的現象，即“大馬拉小車”的現象。
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電木板-科學家用玻璃纖維制造防滑鞋
加拿大科學家開發了一種新型防滑材玻璃纖維料，該材料由埋入柔韌的彈力橡膠中制成，有望在將來用來制作冬季防滑鞋底。該材料是由一種叫作熱塑性聚氨壓克力酯的橡膠塑料制成，成千上萬的玻璃纖維被埋入其中伸展到橡膠外如一個個微小的釘子，使橡膠有如細砂紙般的感覺。
FR4,FRP加拿大科學家開發了一種新型防滑材料，該材料由玻璃纖維埋入柔韌的彈力橡膠中制成，有望在將來用來制作冬季防電木板滑鞋底。近日，研究者將該材料的制作過程發表在美國物理聯合會出版的《應用物理快報》中。
多倫多康複所的博士後研究員Rizvi介紹說，當溫度接近零攝氏度時，冰表面的液態水很容易形成一種薄滑層，而高花紋底的鞋子可以穿過冰表面的薄滑層攫住固態的冰，從而使鞋子具有更好的防滑能力。但花紋底也存在一定的危險性，比如當鞋子的紋路卡在冰裏無法拔出。另外，高花紋底的鞋子在堅硬潮濕的大理石或者瓷磚表面是很滑的。
Rizvi和他的同事，包括來自多倫多大學智能材料與適應性系統實驗室的Hani Naguib，共同研究出了一種方法，生産出的橡膠可以微觀地“攫住”冰面。
該材料是由一種叫作熱塑性聚氨酯的橡膠塑料制成，成千上萬的玻璃纖維被埋入其中伸展到橡膠外如一個個微小的釘子，使橡膠有如細砂紙般的感覺。
據介紹，該材料看似普通的橡膠，FR4,FRP亦可拉伸變形。在幹燥的表面，如地磚上，碳纖維該材料的功能如普通橡膠一樣。但是在冰面上，這種混合了玻璃纖維的橡膠則展示出明顯優于普通橡膠的防滑能力。
博主好站推薦：
FR4,FRP加拿大科學家開發了一種新型防滑材料，該材料由玻璃纖維埋入柔韌的彈力橡膠中制成，有望在將來用來制作冬季防電木板滑鞋底。近日，研究者將該材料的制作過程發表在美國物理聯合會出版的《應用物理快報》中。
多倫多康複所的博士後研究員Rizvi介紹說，當溫度接近零攝氏度時，冰表面的液態水很容易形成一種薄滑層，而高花紋底的鞋子可以穿過冰表面的薄滑層攫住固態的冰，從而使鞋子具有更好的防滑能力。但花紋底也存在一定的危險性，比如當鞋子的紋路卡在冰裏無法拔出。另外，高花紋底的鞋子在堅硬潮濕的大理石或者瓷磚表面是很滑的。
Rizvi和他的同事，包括來自多倫多大學智能材料與適應性系統實驗室的Hani Naguib，共同研究出了一種方法，生産出的橡膠可以微觀地“攫住”冰面。
該材料是由一種叫作熱塑性聚氨酯的橡膠塑料制成，成千上萬的玻璃纖維被埋入其中伸展到橡膠外如一個個微小的釘子，使橡膠有如細砂紙般的感覺。
據介紹，該材料看似普通的橡膠，FR4,FRP亦可拉伸變形。在幹燥的表面，如地磚上，碳纖維該材料的功能如普通橡膠一樣。但是在冰面上，這種混合了玻璃纖維的橡膠則展示出明顯優于普通橡膠的防滑能力。
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玻璃鑽孔-影響光學玻璃質量好壞的重要因素
光學玻璃熔煉後，須制成一CNC玻璃定大小幹和形狀的毛坯，經退火，一些品種再經顯色，檢驗後作爲成品出廠。
成型和顯色是有色光學玻璃生産過程中重要的工序之一，成型方法和顯色的技術水平高低是決定成品率高低和質最好壞的重要因素之一。
一．玻璃的成型 用坩埚熔煉的有色光學玻璃，成型都采用澆注法。澆注法又可分爲大粘度澆注和稀粘度澆注。
黑色玻璃加工透紫玻璃ZWB1，ZWB3成型采用稀粘度澆注，其他品種采用大粘度澆注。
二、玻璃的退火 無色光學玻璃制造的光學零件要有高度的光學均勻性，必須進行精密退火。有色光學玻璃的光學均勻性要求沒有無色光學玻璃的商。它的退火要求主要是消除在成型中産生的永久應力，采用慢速退火即可。退火溫度、退火溫度範圍內保持的時問、降溫速度應根據不同品種和玻璃毛壞的尺寸，通過實驗方法制訂。對玻璃鑽孔于有特殊光學均勻性要求的有色光學玻璃也需進行精密邀火。
有些著色劑(例Mrl，Se等)的著色狀態存退火階段中還會發生變化，對含這類著色劑的玻璃，退火溫度的確定不但要考慮應力的消除，也要考慮著色狀態的變化。
三、玻璃的顯色 所謂顯色，是指退火檢驗後的玻璃再重新加熱到一定溫度(妊色溫度)在此溫度下保持一定時間(顯色玻璃研磨時問)，使玻璃中的著色化合物呈現一定的光潛特性。需要一次顯色的玻璃有黃色、橙色，紅色和近紅外截止型玻璃。
顯色溫度和顯色時問通過實驗確定。從退火後的大塊玻璃中，取若幹小塊試樣，在不同混度和不同時問下熱處理。冷卻後，研磨、抛光、涮定光譜特性、選定合適的溫度和時間．不同爐號玻璃，由于熔煉．成型、退火時的熱曆史不完全相同，每個爐號玻璃的顯色溫度和時間都要通過實驗確定。
顯色玻璃的光譜特性受顯色溫度影響較大，爲使大塊玻璃的顔色達到均勻，顯色應在精密退火爐內進行。精密退火爐的要求與無色光學玻璃退火用的精密退火爐相同。
對于顯色溫度較高的近紅外截止型玻璃，顯色時玻璃已接近軟化，顯色時放置玻璃過程中要用石棉紙把玻璃隔開．顯色玻璃的條紋、氣泡等質量檢驗應在顯色前進行，因爲顯色後由于玻璃顔色深，難以檢驗。
博主好站推薦：
成型和顯色是有色光學玻璃生産過程中重要的工序之一，成型方法和顯色的技術水平高低是決定成品率高低和質最好壞的重要因素之一。
一．玻璃的成型 用坩埚熔煉的有色光學玻璃，成型都采用澆注法。澆注法又可分爲大粘度澆注和稀粘度澆注。
黑色玻璃加工透紫玻璃ZWB1，ZWB3成型采用稀粘度澆注，其他品種采用大粘度澆注。
二、玻璃的退火 無色光學玻璃制造的光學零件要有高度的光學均勻性，必須進行精密退火。有色光學玻璃的光學均勻性要求沒有無色光學玻璃的商。它的退火要求主要是消除在成型中産生的永久應力，采用慢速退火即可。退火溫度、退火溫度範圍內保持的時問、降溫速度應根據不同品種和玻璃毛壞的尺寸，通過實驗方法制訂。對玻璃鑽孔于有特殊光學均勻性要求的有色光學玻璃也需進行精密邀火。
有些著色劑(例Mrl，Se等)的著色狀態存退火階段中還會發生變化，對含這類著色劑的玻璃，退火溫度的確定不但要考慮應力的消除，也要考慮著色狀態的變化。
三、玻璃的顯色 所謂顯色，是指退火檢驗後的玻璃再重新加熱到一定溫度(妊色溫度)在此溫度下保持一定時間(顯色玻璃研磨時問)，使玻璃中的著色化合物呈現一定的光潛特性。需要一次顯色的玻璃有黃色、橙色，紅色和近紅外截止型玻璃。
顯色溫度和顯色時問通過實驗確定。從退火後的大塊玻璃中，取若幹小塊試樣，在不同混度和不同時問下熱處理。冷卻後，研磨、抛光、涮定光譜特性、選定合適的溫度和時間．不同爐號玻璃，由于熔煉．成型、退火時的熱曆史不完全相同，每個爐號玻璃的顯色溫度和時間都要通過實驗確定。
顯色玻璃的光譜特性受顯色溫度影響較大，爲使大塊玻璃的顔色達到均勻，顯色應在精密退火爐內進行。精密退火爐的要求與無色光學玻璃退火用的精密退火爐相同。
對于顯色溫度較高的近紅外截止型玻璃，顯色時玻璃已接近軟化，顯色時放置玻璃過程中要用石棉紙把玻璃隔開．顯色玻璃的條紋、氣泡等質量檢驗應在顯色前進行，因爲顯色後由于玻璃顔色深，難以檢驗。
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2015年3月4日星期三
zinc die casting-Advantages And Disadvantages Of Die Casting
What is Die CastMulti slider die casting machineing?
Die casting is a special metal casting。 It is an advanced method with a long development history on the basis of common metal casting technology。 This process， the molten or semi-molten state of the metal into the die casting machine pressure chamber under high pressure， the metal to high-speed filling into the cavity of the die-casting mold， and then the molten or semi-molten state of the metal will be solidified to the desired mold。 This is a highly efficient precision casting。die casting design development trend is to require better overall performance， higher precision， less allowance smooth surface castings。 In addition， the energy-saving requirements and increasing the voice of the community to restore the natural environment。 In order to meet these requirements， the new cast alloy development， smelting new technology and new equipment correspondingly。
Advantage of Die Casting Process
First， quality of die castings is good。 Casting size is accurate， stable， good exchangeability。 It can make the surface of the particles is thinner， elongation tissueMulti slider die casting machine density compact metal castings， and more compact metal surface hardness， higher density。 This method is suitabledie casting machine for the use of complex thin-walled metal castings， zinc alloy die casting thin-walled aluminum alloy thin-walled 0。5 mm to 0。3 mm， In addition， it is very suitable for the production of complex castings cannot use other methods。 Second， productivity is high。 The productivity of the die casting method is higher than traditional wet sand and resin sand casting process， however， far less than the automatic die casting mold。 However， aluminum castings， it can achieve high production efficiency。Die casting Third， it is economic。 The accuracy of the size of the die casting， surface finish， so the use of die casting without machining or processing can be a small amount， which not only provides the utilization rate of the metal， butzinc die casting also to reduce the processing equipment， die castings with good resistance to wear resistance， insulation and permeability， so they can instead of part of the assembly and simplify the production process not only saves time but also save the raw metal。
Disadvantage of Die Casting Method
In general， diezinc die casting castings have some stomata， and metal casting cannot heat the production， die-casting method has no effect on concave metal， in addition， it is not suitable for small-volume parts production， due to the high cost of the die-casting and high production efficiency， so small batch production is not economical。 The die casting method is widely applied to the casing industry， now， it is used not only for non-ferrous alloys such as zinc， aluminum， magnesium， copper， and is also used for cast iron and steel casting。 It is widely used in various industries of the national economy， such as weapons， cars， the aerospace and TV computer， agricultural machinery， medical equipment， and so on。
Die casting is a special metal casting。 It is an advanced method with a long development history on the basis of common metal casting technology。 This process， the molten or semi-molten state of the metal into the die casting machine pressure chamber under high pressure， the metal to high-speed filling into the cavity of the die-casting mold， and then the molten or semi-molten state of the metal will be solidified to the desired mold。 This is a highly efficient precision casting。die casting design development trend is to require better overall performance， higher precision， less allowance smooth surface castings。 In addition， the energy-saving requirements and increasing the voice of the community to restore the natural environment。 In order to meet these requirements， the new cast alloy development， smelting new technology and new equipment correspondingly。
Advantage of Die Casting Process
First， quality of die castings is good。 Casting size is accurate， stable， good exchangeability。 It can make the surface of the particles is thinner， elongation tissueMulti slider die casting machine density compact metal castings， and more compact metal surface hardness， higher density。 This method is suitabledie casting machine for the use of complex thin-walled metal castings， zinc alloy die casting thin-walled aluminum alloy thin-walled 0。5 mm to 0。3 mm， In addition， it is very suitable for the production of complex castings cannot use other methods。 Second， productivity is high。 The productivity of the die casting method is higher than traditional wet sand and resin sand casting process， however， far less than the automatic die casting mold。 However， aluminum castings， it can achieve high production efficiency。Die casting Third， it is economic。 The accuracy of the size of the die casting， surface finish， so the use of die casting without machining or processing can be a small amount， which not only provides the utilization rate of the metal， butzinc die casting also to reduce the processing equipment， die castings with good resistance to wear resistance， insulation and permeability， so they can instead of part of the assembly and simplify the production process not only saves time but also save the raw metal。
Disadvantage of Die Casting Method
In general， diezinc die casting castings have some stomata， and metal casting cannot heat the production， die-casting method has no effect on concave metal， in addition， it is not suitable for small-volume parts production， due to the high cost of the die-casting and high production efficiency， so small batch production is not economical。 The die casting method is widely applied to the casing industry， now， it is used not only for non-ferrous alloys such as zinc， aluminum， magnesium， copper， and is also used for cast iron and steel casting。 It is widely used in various industries of the national economy， such as weapons， cars， the aerospace and TV computer， agricultural machinery， medical equipment， and so on。
Rubber Parts-Choosing Your Rubber Grommets
Rubber grommets Rubber Partshave a number of versions and each of them are used in several ways in factories as well as in home based equipment of some types。 Each rubber comes with a scale and you will have to decide on this based on what you are going to use it for。 Also， the size of the grommet will depend on the size of the two spaces that you are trying to bring together。
To make the understanding a bit simpler， a grommet can be seen as ring that is put into a hole and through a particular material。 Grommets are flared or come in collared versions for either side， to keep things in place。 They are made of metal or plastic and sometimes also in rubber。 Your choice will depend on the work you need it to do。 The smallest version of grommet is the eyelet that you often see used on your sports shoes。
When you are handling harder material such as metal or the like， holes drilled into them can result in rough edges。 This means that if you are passing through wires or softer material， they can get abraded。 This problem especially exists with electrical insulation。 In such cases the use of rubber grommets or those made purely of plastic or even coated with plastic can be used to cover up the rough edges。 The smooth surface of the grommet is what protects the hole and anything passing through it。
When there is a need to pass wires through a punched sheet of metal， grommets come into play。 There are molded as well as continuous strip grommets that are also known as edge grommets。 They come in a number of shapes and sizes depending on what you are using it for。 You should make your choice of grommets based on your needs。 It is important to get the right experts to evaluate your needs and settle for the right kind of product。
To make the understandingRubber O-Ring a bit simpler， a grommet can be seen as ring that is put into a hole and throughCustom Mold Rubber Parts a particular material。 Grommets are flared or come in collared versions for either side， to keep things in place。 They are made of metal or plastic and sometimes also in rubber。 Your choice will depend on the work you need it to do。 The smallest version of grommet is the eyelet that you often see used on your sports shoes。
When you are handling harder material such as metal or the like， holes drilled into them can result in rough edges。 This means that if you are passing through wires or softer material， they can getRubber Seal abraded。 This problem especially exists with electrical insulation。 In such cases the use of rubber grommets or those made purely of plastic or even coated with plastic can be used to cover up the rough edges。
It is always a good idea to use a single distributor。 It helps you get products delivered on time and you can also be assured of the quality of the products。 Having a long term association with one company will also allow you to get emergency deliveries if they are needed。 Such is the rapport your need to build up in order to grow your business as wellRubber Gasket as the quality of the products you are offering。
Industrial monitor-Technical Advantages Of R4 Networking
Lighthouse TechnFanless pcologies Limited today announced itIndustrial monitor will introduce the R4 LED display screen to the United States market at InfoComm 2006。 The ultra high resolution R4 was designed in response to customers´ needs for a noiseless yet stunning indoor display。
The R4 is the first Lighthouse productsunlight readable to betouch screen monitor fully RoHS (Restrictions on Hazardous Substances) compliant for lead-free products。 TheIndustrial pc R4 will make its first appearance in the US at InfoComm 2006 from June 7 - 10， 2006 in Orlando， Florida， Booth 3579。
"The R4Box PC complements our existing product line，" said Mark Chan， Managing Director for Lighthouse Technologies Limited。 "We are offering our customers a full range of LED video display screensVideo wall from large-pixel outdoor displays to quiet and ultra high resolution indoor LED video display solution。"
With the award-winning M4 uniformity control technology and 14 bit processing technology， the ultra highIP66 resolution R4 delivers stunning images。
The R4´s fanless design makes it the best choice for television studios， board and meeting rooms， houses of worship， corporate lobbies， museums or anywhere requiring minimal noise。 Its noise level is far below audible noise levels that can interfere with microphonesAll in one computer or normal conversations in a meeting room， or at quiet performances such as a solo performer or in a venue with a cozy audience where a noisy compressor would be an unwanted interruption。
The R4 is cooled by natural convection， supported by attached heat sinks for additional cooling。 A major contributing factor to the low heat generation of the R4 is the use of the very bright 3-in-I surface mounted LEDs package that run at lower power。
The R4´s seamless mechanical cabinetpanel PC system with interlocking king-pin connectors and the integrated control system provide for quick， trouble-free assembly under the most challenging set-up conditions， yet it isdigital signage rugged enough for the rigorous demands。
The R4 is the first Lighthouse productsunlight readable to betouch screen monitor fully RoHS (Restrictions on Hazardous Substances) compliant for lead-free products。 TheIndustrial pc R4 will make its first appearance in the US at InfoComm 2006 from June 7 - 10， 2006 in Orlando， Florida， Booth 3579。
"The R4Box PC complements our existing product line，" said Mark Chan， Managing Director for Lighthouse Technologies Limited。 "We are offering our customers a full range of LED video display screensVideo wall from large-pixel outdoor displays to quiet and ultra high resolution indoor LED video display solution。"
With the award-winning M4 uniformity control technology and 14 bit processing technology， the ultra highIP66 resolution R4 delivers stunning images。
The R4´s fanless design makes it the best choice for television studios， board and meeting rooms， houses of worship， corporate lobbies， museums or anywhere requiring minimal noise。 Its noise level is far below audible noise levels that can interfere with microphonesAll in one computer or normal conversations in a meeting room， or at quiet performances such as a solo performer or in a venue with a cozy audience where a noisy compressor would be an unwanted interruption。
The R4 is cooled by natural convection， supported by attached heat sinks for additional cooling。 A major contributing factor to the low heat generation of the R4 is the use of the very bright 3-in-I surface mounted LEDs package that run at lower power。
The R4´s seamless mechanical cabinetpanel PC system with interlocking king-pin connectors and the integrated control system provide for quick， trouble-free assembly under the most challenging set-up conditions， yet it isdigital signage rugged enough for the rigorous demands。
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