- QX/T 456-2018 初霜冻日期早晚等级.pdf
- 完整、正式版 GB/T 28712.5-2023 热交换器型式与基本参数 第5部分：螺旋板式热交换器.pdf
- GB/T 28712.5-2023 热交换器型式与基本参数 第5部分：螺旋板式热交换器.pdf
- 高清无水印 陕22G03 墙下条形基础图集（替代陕09G03）.pdf
- BS EN 1092-1-2007 Flanges and their joints - Circular flanges for pipes valves fittings and accessories PN designated - Part 1 Steel flanges.pdf
- BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes valves fittings and accessories PN designated. Cast iron flanges.pdf
- EN 1111-1998 Sanitary tapware - Thermostatic mixing valves (PN 10) - General technical specification.pdf
- GB 12380.1-1990 PN 1.0 MPa (10bar)凸面整体球墨铸铁管法兰.pdf
- GB 12380.2-1990 PN 1.6 MPa (16bar)凸面整体球墨铸铁管法兰.pdf
- GB 12380.3-1990 PN 2.0 MPa (20bar)凸面整体球墨铸铁管法兰.pdf
- GB 12380.4-1990 PN 2.5 MPa (25bar)凸面整体球墨铸铁管法兰.pdf
- GB 12380.5-1990 PN 4.0 MPa (40bar)凸面整体球墨铸铁管法兰.pdf
- GB 12380.6-1990 PN 5.0 MPa (50bar)凸面整体球墨铸铁管法兰.pdf
- GB 12383.1-1990 PN 1.0 MPa (10bar)凸面球墨铸铁管法兰盖.pdf
- GB 12383.2-1990 PN 1.6 MPa (16bar)凸面球墨铸铁管法兰盖.pdf
- GB 12383.3-1990 PN 2.0 MPa(20bar)凸面球墨铸铁管法兰盖.pdf
- GB 12383.4-1990 PN 2.5 MPa (25bar)凸面球墨铸铁管法兰盖.pdf
- GB 12383.5-1990 PN 4.0 MPa (40bar)凸面球墨铸铁管法兰盖.pdf
- GB 12383.6-1990 PN 5.0 MPa (50bar)凸面球墨铸铁管法兰盖.pdf
- JB/T 1308.1-1999 PN 250MPa 阀门型式和基本参数.pdf
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