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how the steel was tempered2020-02-28
After reading this opus, I’ve learned a great leon.Those tortuous plots really put me in a deep thought.To a large degree, this novel mainly describe...
how the steel was ,,,(钢铁是怎样炼成的英文读后感)2020-02-28
How the steel was tempered This holiday, I read a book named “how the steel was tempered”.It’s created by NikolayerichAleksandrOstrovsky.The leadin...
The thought about How the Steel Was Tempered《钢铁是怎样炼成的》英语读后感2020-02-29
The thought about How the Steel Was Tempered Student:龙昱燕Number：200911010221Date：2011-5-16The thought about How the Steel Was Tempered When I wa...
型钢类 圆钢(ROUND STEEL)方钢(SQUARE STEE)2020-02-27
型钢类 圆钢（ROUND STEEL）方钢（SQUARE STEE）二、型钢类圆钢（ROUND STEEL）方钢（SQUARE STEE）1.概述圆钢属建造用和机械用碳素结构钢，方钢属机械结构用碳素钢。二者同为简单...
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