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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 32076.3-2015 |
High-strength structural bolting assemblies for preloading—Part 3: System HR—Hexagon bolt with large width across flats and nut assemblies 预载荷高强度栓接结构连接副 第3部分：HR型 大六角头螺栓和螺母连接副 |
China National Standards HR—Hexagon |
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