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First, on the cast iron shaft with a roller when the anvil, then use the railroad tracks when anvil.
先是用碾子上铸铁的轴当砧子，后来用铁道轨当砧子。
youdao
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First, on the cast iron shaft with a roller when the anvil, then use the railroad tracks when anvil.
先是用碾子上铸铁的轴当砧子，后来用铁道轨当砧子。
youdao