This standard specifies the types, parameters and main dimensions of mechanical seals for submersible electric pumps, model repres

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JB/T 5963-1991 Two-way, three-way and four-way threaded cartridge valve hole dimensions JB/T5963-1991 Standard download decompress

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This standard refers to the international standard ISO 7891. JB/T 5961-1991 Dimensions and arrangement of holes for bulldozer angl

This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage

This standard specifies the performance indicators, metallographic structure, appearance quality, test methods, inspection rules,