张家港市海际机械厂

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Feb 2010
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Search TAG:齿轮 链轮 据史料记载,远在公元前400~200年的中国古代就巳开始使用齿轮,在我国山西出土的青铜齿轮是迄今巳发现的最古老齿轮,作为反映古代科学技术成就的指南车就是以齿轮机构为核心的机械装置。
- May 24, 2010Release date:
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