China Automatic Greenhouse Vent

Instantly opens and closes the roof vent/window when temperature alterations. The opener has a metallic cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes...

Китайские производители пластмассовых изделий, литье под давлением, коррозионностойкий нейлон Mc, промышленные конвейерные стеллажи, шестерни.

Name Plastic manufacturers injection molding corrosion resistant MC nylon industrial conveyor rack gear Material Acrylic,PC,PVC,Nylon,PEEK,PU,PA,POM,PE,UPE,PTFE,etc. Color White,black,green,nature,blue,yellow,etc Diameter 5-200mm,or customized Condition In stock/Made...