... furnace to 700°,then the glass is rapidly cooled with jets of cold air to 40°,through the procedures, the original ... glass to approach its softening temperature and suddenly chilling with jets of cold air to change the mechanical intensity strengthen and ...
Metal enclosure According to IEC 60 947-1 & IEC 60 947-3 waterproof switch/IP 65 switch/electrical switch waterproof switch/IP 65 switch/electrical switchAluminium allou enclosure:KKSE 340M/TPN3P,40ADegree of protection:IP 54 dust protected and splash-proof IP 65 dust proof and resistant to water jets from all directions. waterproof IP 65 electrical switch
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