851 gb/t 11358-1989 平带传动 带轮直径尺寸 flat belt drive pulleys diameters

　　852 gb/t 11359-1989 平带传动 平带及带轮的宽度 flat belt drive belt and pulleys—widths

　　853 gb/t 11360-1989 平带传动 带轮轮缘凸面 flat belt drive pulleys—crowns

　　854 gb/t 11361-1989 同步带传动 带轮 synchronous belt drives—pulleys

　　855 gb/t 11362-1989 同步带传动 额定功率和传动中心距的计算 synchronous belt drives—calculation of power rating and drive centre distance

　　856 gb/t 11365-1989 锥齿轮和准双曲面齿轮 精度 accuracy of bevel and hypoid gears

　　857 gb/t 11366-1989 行星传动基本术语 basic terminology of planetary drives

　　858 gb/t 11367-1989 锥齿轮胶合承载能力计算方法 methods for the calculation of scuffing load capacity for bevel gears

　　859 gb/t 12220-1989 通用阀门 标志 general purpose industrial valves—marking

　　860 gb/t 12221-1989 法兰连接金属阀门 结构长度 metal valves for use in flanged pipe systems—face-to -face and centre-to-face dimensions

　　861 gb/t 12222-1989 多回转阀门驱动装置的连接 multi-turn valve actuator attachment

　　862 gb/t 12223-1989 部分回转阀门驱动装置的连接 part-turn valve actuator attachment

863 gb/t 12224-1989 钢制阀门 一般要求 general requirements for industrial steel valves

　　864 gb/t 12225-1989 通用阀门 铜合金铸件技术条件 general purpose industrial valves—specification of copper alloy castings

　　865 gb/t 12226-1989 通用阀门 灰铸铁件技术条件 general purpose industrial valves—specification of flake graphite iron castings

　　866 gb/t 12227-1989 通用阀门 球墨铸铁件技术条件 general purpose industrial valves—specification of spheroidal graphite iron castings

　　867 gb/t 12228-1989 通用阀门 碳素钢锻件技术条件 general purpose industrial valves—specification of carbon steel forgings

　　868 gb/t 12229-1989 通用阀门 碳素钢铸件技术条件 general purpose industrial valves—specification of carbon steel castings

　　869 gb/t 12230-1989 通用阀门 奥氏体钢铸件技术条件 general purpose industrial valves—specification of austenitic steel castings

　　870 gb/t 12232-1989 通用阀门 法兰连接铁制闸阀 general purpose industrial valves—flanged iron gate valves

　　871 gb/t 12233-1989 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

　　872 gb/t 12234-1989 通用阀门 法兰和对焊连接钢制闸阀 general purpose industrial valves—flanged and butt-weld steel gate valves

　　873 gb/t 12235-1989 通用阀门 法兰连接钢制截止阀和升降式止回阀 general purpose industrial valves—flanged steel globe valves and lift check valves

874 gb/t 12236-1989 通用阀门 钢制旋启式止回阀 general purpose industrial valves—steel swing check valves

　　875 gb/t 12237-1989 通用阀门 法兰和对焊连接钢制球阀 general purpose industrial valves——flanged and butt-weld end steel ball valves

　　876 gb/t 12238-1989 通用阀门 法兰和对夹连接蝶阀 general purpose industrial valves—flanged and wafer butterfly valves

　　877 gb/t 12239-1989 通用阀门 隔膜阀 general purpose industrial valves—diaphragm valves

　　878 gb/t 12240-1989 通用阀门 铁制旋塞阀 general purpose industrial valves—iron plug valves

　　879 gb/t 12241-1989 安全阀 一般要求 safety valves—general requirements

　　880 gb/t 12242-1989 安全阀 性能试验方法 performance test methods for safety valves

　　881 gb/t 12243-1989 弹簧直接载荷式安全阀 spring loaded safety valves

　　882 gb/t 12244-1989 减压阀一般要求 general specification for pressure reducing valves

　　883 gb/t 12245-1989 减压阀 性能试验方法 methods of performance test for pressure reducing valves

　　884 gb/t 12246-1989 先导式减压阀 pilot-operated reducing valves

　　885 gb/t 12248-1989 蒸汽疏水阀 术语 automatic steam traps—definition of technical terms

　　886 gb/t 12249-1989 蒸汽疏水阀 标志 automatic steam traps—marking

　　887 gb/t 12250-1989 蒸汽疏水阀 结构长度 automatic steam traps—face-to-face dimension

888 gb/t 12251-1989 蒸汽疏水阀 试验方法 automatic steam traps—test methods

　　889 gb/t 12278-1990 向心关节轴承 径向游隙 spherical plain radial bearings, joint type—redial internal clearance

　　890 gb/t 12368-1990 锥齿轮模数 modules of bevel gears

　　891 gb/t 12369-1990 直齿及斜齿锥齿轮基本齿廓 basic tooth profile of straight and skew bevel gears

　　892 gb/t 12370-1990 锥齿轮和准双曲面齿轮 术语 terminology for bevel and hypoid gears

　　893 gb/t 12371-1990 锥齿轮 图样上应注明的尺寸数据 bevel gears—information of the dimensional data to be given on the drawing

　　894 gb/t 12385-1990 管法兰用垫片密封性能试验方法 test method for sealing characteristics of gaskets for pipe flanges

　　895 gb/t 12458-1990 机械式联轴器分类 mechanical coupling—classification

　　896 gb/t 12459-1990 钢制对焊无缝管件 steel butt-welding seamless pipe fittings

　　897 gb/t 12473-1990 小模数圆柱齿轮减速器通用技术条件 general specification for speed reducer with small module cylindrical gears

　　898 gb/t 12601-1990 谐波齿轮传动基本术语 basic terminology of harmonic gear drive

　　899 gb/t 12613-1990 滑动轴承 卷制轴套 plain bearings—wrapped bushes

　　900 gb/t 12615-1990 封闭型扁圆头抽芯铆钉 mushroom head break mandrel closed end blind rivets