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| tube making; making tube (The manufacturer has modestly described the two basic ways of making tubes as either wrapping an accurate hole in steel strip or pushing a very strong hole through a steel bar. 这家制造商简明扼要地描述了两种基本制管方法：一是用带钢卷出一个精确的孔，二是在钢棒上推轧出一个坚固的孔。); tubemaking | |||
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