piercing mill造句怎么写
- 造句
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2、Mannesmann piercing mill
4、piercing mill for metal billets
6、Briefly described in the article are the structure of the three - roll piercing mill and troubles and failures frequently occurring in the operation thereof.
3、barrel type roll piercing mill
1、three-roll piercing mill
5、stiefel mannesmann type piercing mill
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