This standard specifies the type, model and basic parameters of light and small single-stage centrifugal pumps. This standard appl

This standard specifies the technical requirements, test methods, inspection rules, marking and packaging of light and small pipe

This standard specifies the types, models and basic parameters of light and small pipe water irrigation units. This standard is ap

This standard specifies the product type, technical requirements, test methods, inspection rules, marking, packaging, transportati

This standard specifies the technical requirements, inspection rules and sampling methods for pneumatic rubber seals. This standar

This standard specifies the size series and tolerances of O-rings for pneumatic applications. This standard applies to the size se

This standard specifies the groove dimensions and tolerances of pneumatic O-rings (hereinafter referred to as O-rings) with workin

This standard specifies the basic structure, size series and tolerance of QY, C, C, J, ZHM polyurethane rubber seals and QH expose