... Not Replacing 而无需替换 ; 不取代 casing replacing 换井口套管 string replacing 字符串替换 ...
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The advantages of the production for the aluminium alloy casing with backward extruding technology replacing multi-pass ironing technology are marrated.
叙述了用反挤压工艺代替多道变薄拉伸工艺生产铝合金外壳的优点。
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