... norm relevant regulation. Pitch and take the normal environment temperature of condition of work-25 degrees centigrade -60 degrees ... centigrade, working ±85 degrees centigrade of temperature,≥500N of pulling force, normenonn material ICr18Ni9, coating P.V ... places of the room, such as in the open, humidity, high temperature ,etc., resist and rub, be anticorrosive, resist and ...