
【国外标准】 Steel arches for use in mines (straight sided, horse-shoe and splay-legged)
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适用范围:
暂无
标准号:
BS 227:1934
标准名称:
Steel arches for use in mines (straight sided, horse-shoe and splay-legged)
英文名称:
Steel arches for use in mines (straight sided, horse-shoe and splay-legged)标准状态:
被代替-
发布日期:
1937-11-01 -
实施日期:
出版语种:
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