bs 64_1992.pdf
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bs 64_1992,铁路鱼尾板用的标准和高强度钢螺栓和螺母规范specification for normal and high strength steel bolts and nuts for railway rail fishplates
内容介绍
铁路鱼尾板用的标准和高强度钢螺栓和螺母规范
Specification for normal and high strength steel bolts and nuts for railway rail fishplates
Specification for normal and high strength steel bolts and nuts for railway rail fishplates
