配重铁是现代机械制造工业的基础工艺之一。
The counterweight iron is one of modern machine manufacture industry foundation crafts.
铸造是现代机械制造工业的基础工艺之一。
The casting is one of modern machine manufacture industry foundation crafts.
铸造是现代机械制造工业的基础工艺之一。
The casting is one of modern machine manufacture industry foundation crafts.
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