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航空导管用20A薄壁无缝钢管规范
价格：￥0.00
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航空空心铆钉用18A薄壁无缝钢管规范
价格：￥0.00
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金刚石岩芯钻探用无缝钢管
Seamless steel tubes standard use diamond core drilling
价格：￥0.00
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梯唇型橡胶圈接口铸铁管件
Grey cast iron fittings with rubber ring of ladder-iip-shaped
价格：￥0.00
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结构用高强度耐候焊接钢管
High strength atmospheric corrosion resisting welded steel tubes for structural purposes
价格：￥0.00
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