This standard replaces JB 2792-79. This standard specifies the type and basic parameters of the tensioning device of the traction

This standard specifies the types and basic parameters of guide wheels for circulating freight aerial ropeways. This standard is a

This standard replaces JB 2789-79. This standard applies to double-line circulating freight aerial ropeways for transporting bulk

JB/T 2781-1991 Technical conditions for miniature ball bearings JB/T2781-1991 Standard download decompression password: www.bzxz.n

This standard applies to the temperature marking of threaded flanges, blind plates, studs, stepped studs, nuts, lens pads and non-

This standard specifies the type, size, and technical requirements of non-porous lens gaskets for forged high-pressure valves. Thi

This standard specifies the type, size, and technical requirements of lens gaskets for flange-connected angle high-pressure valves

This standard specifies the type, size, and technical requirements of nuts for forged high-pressure valves. This standard applies