JB/T 2500-1997 This standard is a revision of ZB D93 003-88 "Pneumatic winch" and JB/T 2500-92 "JQH type pneumatic winch", and is

This standard specifies that the internal spline tooth profile is a straight line, the external spline tooth profile is a 45° stan

JB/T 2477-1999 This standard is a revision of JB 2477-79 "Main parameters of two-roller cold rolling mill". The main parameters of

JB/T 2474-1999 This standard is a revision of JB 2474-79 "Basic Parameters of Hydraulic Screw Press". This standard specifies the

JB/T 50119-1998 This standard provides the general principles and data analysis and processing procedures for the on-site reliabil

JB/T 50110-1998 JB/T 50110-1998 Reliability test specification for transmission shaft of four-wheeled agricultural transport vehic

JB/T 50109-1998 This standard specifies the test items, test methods and evaluation indicators for the reliability assessment of t

JB/T 50106-1998 This standard specifies the test items, test methods and evaluation indicators for the reliability of leaf springs