Sharing: precision steel pipe fire protection measures1, outsourcing layer. Outsourcing is in auto precision steel tube appearance add layer, can cast-in-situ forming, spraying method can also be adopted. Cast-in-situ molding outsourcing entities concrete layer Cold Drawn Steel Tubes usually use steel wire or steel to strengthen, to limit the shrinkage crack, and secure shell Strength. Spraying...

Type needle valve actuating device according to the output shaft is divided into many rotary movement way, part of the rotary and linear reciprocating 3 kinds. Rotary rotary is more circle, more suitable for the stem or stem nut need revolving circle in order to fully open or close the valve, such as gate valve, globe valve, the output torque value of series of 40 ~ 10000), commonly (thrust is...