In order to reduce manufacturing progress, a measure how to cut inward oriented hole is introduced.
还介绍了一种线切割内导柱孔方法，减少了制造过程中的一些环节。
The oriented hole construction technique is key in no dig engineering, it decides the success or defeated of no dig engineering.
导向孔的施工是非开挖施工的关键，它决定着非开挖的成功与否。
The construction of oriented hole, seepage prevention wall, and checking hole are introduced, briefly concerning about the special instance.
文中介绍先导孔、防渗墙、检查孔的施工，并就在施工遇到的特殊情况进行了简要性论述。
By use of oriented perforator, a certain variance of Angle and azimuth between actual perforated hole and former design is made which mainly caused by hole trace, perforated hole Angle.
采用定向射孔，使得实际射孔孔眼与原来设计的具有一定角度和方位的偏差，主要有孔眼轨道产生的偏差、孔眼角度产生的偏差等。
This paper introduces a technique of erecting framework and rig at the upper part of the caisson, making underwater boring and oriented explosion by layers within the bore hole.
本文介绍了在沉井上部搭台架设钻机，进行水下钻孔，孔内分层定向爆破技术。
This paper introduces a technique of erecting framework and rig at the upper part of the caisson, making underwater boring and oriented explosion by layers within the bore hole.
本文介绍了在沉井上部搭台架设钻机，进行水下钻孔，孔内分层定向爆破技术。
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