通用钢 meaning in Chinese

general steel
primary steel

Founding - ultrasonic examination - steel castings for general purposes
铸造.超声检验.通用钢铸件
Founding - ultrasonic examination - part 1 : steel castings for general purposes
铸造.超声波检验.第1部分:通用钢铸件
Rules for the inspection of general - purposesteel and cast iron pipe fittings for export
出口通用钢制和铸铁管件检验规程
Founding - ultrasonic examination - part 1 : steel castings for general purposes ; german version en 12680 - 1 : 2003
锻造.超声波检验.通用钢铸件