布放后应保留适当长度于引进端人（手）孔或拉箱内。

Keep proper length of pipe when put into the manhole .

youdao

如果拉不出，可在内孔浇点煤油再拉。

If the pull-no, you can pour point of kerosene, including hole and then pull.

youdao

本文首先将内孔拉削系统简化为单自由度系统，给出其振动的数学模型并对其进行运算和处理。

In this article the broaching internal round hole system is simplified to the single-freedom system.

youdao

本文首先将内孔拉削系统简化为单自由度系统，给出其振动的数学模型并对其进行运算和处理。

In this article the broaching internal round hole system is simplified to the single-freedom system.

youdao