但当遇见大型构件，如球磨机滚筒时就显示出其理论上的严重不足缺陷。
But when meet large components, such as the ball mill roller when he shows its theoretical seriously insufficient defects.
但当遇见大型构件，如球磨机滚筒时就显示出其理论上的严重不足缺陷。
But when meet large components, such as the ball mill roller when he shows its theoretical seriously insufficient defects.
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