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Needle rod metal has changed for the steel alloy, gotten unique finish.
高速套结机针棒套筒为合金钢材质，经特殊处理。
youdao
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How can you grind such a thick iron rod into a needle?
这么粗的铁棒，您怎么能磨成针呢？
youdao
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How can you grind such a thick iron rod into a needle?
这么粗的铁棒，您怎么能磨成针呢？
youdao