枪钻技术是一种高效率、高精度的孔加工方法，国外已广泛采用。

Gun drilling is a high efficient and high precision hole processing method extensively adopted in foreign countries.

youdao

枪钻技术是一种高效率、高精度的孔加工方法，国外已广泛采用。

Gun drilling is a high efficient and high precision hole processing method extensively adopted in foreign countries.

youdao