This paper describes a non - excavating construction machine - hydraulic perforator.
本文介绍了一种新型非开挖施工机械———液动穿孔机。
2
In this paper, tho design principles, structures and applications of the perforator.
本文简要介绍它的设计原理和结构及工程应用。
3
This paper introduces the criterion of selecting pump, detonation mode, principle and action of inner blind hole perforator and tubing pump joint technology.