[国家标准] GB 12260-2017心肺转流系统 滚压式血泵Cardiopulmonary bypass systems-Roller blood pump

2021-10-19

[国家标准] GB 12257-2000氦氖〗激光治疗机通用技术条件General specification of He-Ne laser medical equipment

2021-10-19

[国家标准] GB/T 12251-2005蒸汽疏水∮阀 试验方法Automatic steam traps--Test methods

2021-10-19

[国家标准] GB/T 12250-2005蒸汽疏水阀 术语、标志、结构长度Automatic steam traps--Term,Marking,Face-to-face dimensions

2021-10-19

[国家标准] GB/T 12247-2015蒸汽疏水阀 分类Automatic steam traps--Classification

2021-10-19

[国家标准] GB/T 12246-2006先导式减压阀Pilot-operated pressure reducing valves

2021-10-19

[国家标准] GB/T 12245-2006减压阀 性能试验方法Methods of performance test for pressure reducing valves

2021-10-19

[国家标准] GB/T 12244-2006减压阀 一般要求General requirements for pressure reducing valves

2021-10-19

[国家标准] GB/T 12243-2005弹簧直接载荷式安全阀Spring loaded safety valves

2021-10-19

[国家标准] GB/T 12242-2005压力释放装＠置 性能试验规范Performance test code--Pressure relief devices

2021-10-19

[国家标准] GB/T 12241-2005安全阀 一般要求Safety valves--General requirements

2021-10-19

[国家标准] GB/T 12240-2008铁制旋塞阀Iron plug valves

2021-10-19

[国家标准] GB/T 12239-2008工业阀门 金属隔膜阀Industrial valves--Diaphragm valves made of metallic materials

2021-10-19

[国家标准] GB/T 12238-2008法兰和对夹连接弹性密封蝶阀Flanged and wafer resilient seal butterfly valves

2021-10-19

[国家标准] GB/T 12237-2007石油、石化及相关工业用的钢制球阀Stell ball valves for petroleum,petrochemical and allied industries

2021-10-19

[国家标准] GB/T 12236-2008石油、化工及相关工业用的钢制旋启式止回阀Steel swing check valve for petroleum,petrochemical and allied industries

2021-10-19

[国家标准] GB/T 12235-2007石油、石化及相关工业用钢制截止阀和升降式止回阀Steel globe valves and lift check valve for petroleum,petrochemical and allied industries

2021-10-19

[国家标准] GB/T 12234-2019石油、天然气工业用螺柱连接阀盖的钢制闸阀Bolted bonnet steel gate valves for petroleum and natural gas industries

2021-10-19

[国家标准] GB/T 12233-2006通用阀门 铁制截止阀与升降式止回阀General purpose industrial valves--Casting iron globe valves and lift check valves

2021-10-19

[国家标准] GB/T 12232-2005通用阀门 法兰连接铁制闸阀General purpose industrial valves--Flanged iron gate valves

2021-10-19

[国家标准] GB/T 12230-2005通用阀门 不锈钢铸件技术条件General purpose industrial valves--Specification of stainless steel castings

2021-10-19

[国家标准] GB/T 12229-2005通用阀门 碳素钢铸件技术条件General purpose industrial valves--Specification of carbon steel castings

2021-10-19

[国家标准] GB/T 12228-2006通用阀门 碳素钢锻件技术条件General purpose valves--Specification of carbon steel forgings

2021-10-19

[国家标准] GB/T 12227-2005通用阀门 球墨铸铁件技术条件General purpose industrial valves--Specification of spheroidal graphite iron castings

2021-10-19

[国家标准] GB/T 12226-2005通用阀门 灰铸铁件技术条件General purpose industrial valves--Specification of flake graphite iron castings

2021-10-19