51 GB/T 2484-1994 普通磨具 代号和标记 Symbols and designation for bonded abrasive products
52 GB/T 2487-1984 油石 Oil stones and sticks
53 GB/T 2488-1984 砂瓦 Segments of grinding wheels
54 GB/T 2489-1984 薄片砂轮 Thin grinding wheels
55 GB/T 2492-1984 砂轮静平衡检验方法及不平衡数值 Static balance testing for grinding wheels and unbalance value
56 GB/T 2493-1995 砂轮的回转试验方法 Rotation test of grinding wheel strength
57 GB 2494-1995 磨具安全规则 Safety rules for bonded abrasives
58 GB/T 2495-1996 普通磨具 包装 Packing for bonded abrasive products
59 GB/T 2804-1981 组合夹具元件结构要素 Modular parts of fixture construction--General features, profiles and dimensions
60 GB/T 2851.1-1990 冲模滑动导向模架 对角导柱模架 Sliding guide die sets for press tools—Diagonal pillar sets
61 GB/T 2851.3-1990 冲模滑动导向模架 后侧导柱模架 Sliding guide die sets for press tools—Back pillar sets
62 GB/T 2851.4-1990 冲模滑动导向模架 后侧导柱窄形模架 Sliding guide die sets for press tools—Back pillar sets (narrow)
63 GB/T 2851.5-1990 冲模滑动导向模架 中间导柱模架 Sliding guide die seta for press tools—Center pillar sets
64 GB/T 2851.6-1990 冲模滑动导向模架 中间导柱圆形模架 Sliding guide die sets for press tools—Center pillar sets (round)
65 GB/T 2851.7-1990 冲模滑动导向模架 四导柱模架 Sliding guide die sets for press tools—Four pillar die sets
66 GB/T 2852.1-1990 冲模滚动导向模架 对角导柱模架 Ball slide die sets for press tools—Diagonal pillar sets
67 GB/T 2852.2-1990 冲模滚动导向模架 中间导柱模架 Ball slide die sets for press tools—Center pillar sets
68 GB/T 2852.3-1990 冲模滚动导向模架 四导柱模架 Ball slide die sets for press tools—Four pillar die sets
69 GB/T 2852.4-1990 冲模滚动导向模架 后侧导柱模架 Ball slide die sets for press tools—Back pillar die sets
70 GB/T 2855.1-1990 冲模滑动导向模座 对角导柱上模座 Holder for sliding guide die sets for press tools—Punch holder for diagonal pillar sets
71 GB/T 2855.2-1990 冲模滑动导向模座 对角导柱下模座 Holder for sliding guide die sets for press tools—Die holder for diagonal pillar sets
72 GB/T 2855.5-1990 冲模滑动导向模座 后侧导柱上模座 Holder for sliding guide die sets for press tools—Punch holder for back pillar sets
73 GB/T 2855.6-1990 冲模滑动导向模座 后侧导柱下模座 Holder for ball slide die sets for press tools—Die holder for back pillar sets
74 GB/T 2855.7-1990 冲模滑动导向模座 后侧导柱窄形上模座 Holder for sliding guide die sets for press tools—Punch holder for back pillar sets (narrow)
75 GB/T 2855.8-1990 冲模滑动导向模座 后侧导柱窄形下模座 Holder for sliding guide die sets for press tools—Die holder for back pillar sets (narrow)
76 GB/T 2855.9-1990 冲模滑动导向模座 中间导柱上模座 Holder for sliding guide die sets for press tools—Punch holder for center pillar sets
77 GB/T 2855.10-1990 冲模滑动导向模座 中间导柱下模座 Holder for ball slide die sets for press tools—Die holder for center pillar sets