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- TZ 011-199001 公用分组交换数据网技术体制
- TZ 011-199001
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- HB 2413-1977 HB 243-70CG螺纹塞规及螺纹分组塞规应用尺寸d=5～30mm
- HB 2413-1977
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- HB 2412-1977 HB 243-70CG螺纹分组塞规d=6～30mm
- HB 2412-1977
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- HB 2411-1977 HB 243-70CG螺纹分组塞规d=5mm
- HB 2411-1977
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- HB 2408-1977 HB 243-70AG、BG螺纹塞规及螺纹分组塞规应用尺寸d=3～30mm
- HB 2408-1977