When I pushed on the harpoon shaft the second time.
那是在我第二次握着鱼叉的柄扎进去的时候。
Regularly check the wear of pipe shaft sleeve , wear in time after a larger replacement.
定期检查管道泵轴套的磨损情况，磨损较大后应及时更换。
Regularly check the wear of pipe shaft sleeve , wear in time after a larger replacement.
定期检查管道泵轴套的磨损情况，磨损较大后应及时更换。
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