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。
They climb through the sleeve pipe to the other side and hit a wall.
他们钻过那条套管，直到另一边一堵墙挡住了他们。
They climb through the sleeve pipe to the other side and hit a wall.
他们钻过那条套管，直到另一边一堵墙挡住了他们。
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