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gost-tool-26810-86参考技术资料
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gost_18698-79
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DIN_7504相关标准规范
September 1995Self-drilling tapping screws瓜Dimensions,requirements and testing7504ICS21.060.10Supersedes February 1992 edition.Descriptors:Self-drilling tapping screws,tapping scr...
上海市产业绿色发展十四五规划
上海市产业绿色发展“十因五”规剑产业绿色发展是提升生态环境质量、建设生态宜居城市的基础,是提升本市产业核心竞争力的重要支撑,是实现碳达峰碳中和的重要抓手,根据工业和信息化部《“十四...