Cone Crusher provide a "spring" over the release of iron to protect.

锥碎机提供“弹簧式”过铁释放保护。

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In the spring and Autumn period, copper and iron chopsticks came into being.

在春秋时期出现了铜制和铁制的筷子。

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In the spring and Autumn period, copper and iron chopsticks came into being.

在春秋时期出现了铜制和铁制的筷子。

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