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喜讯:我国成功研制出1级精度标准齿轮 |
点评
这就是传说中的“牛粪”!!!
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发表于 2011-8-20 09:05
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发表于 2011-8-20 09:06
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发表于 2011-8-20 20:07
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发表于 2011-8-20 20:21
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是疑似一级精度的齿轮
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