
BS EN 14399-9. High strength structural bolting assemblies for preloading. Part 9. System HR or HV. Bolt and nut assemblies with direct tension indicators
出版:British Standards Institution

专家解读视频
BS EN 14399-9. High strength structural bolting assemblies for preloading. Part 9. System HR or HV. Bolt and nut assemblies with direct tension indicators
出版:British Standards Institution
专家解读视频