designation hole的意思|示意

This paper describes the designation of a measuring instrument of the angle of the inclined hole, and develops a professional instrument which is low-cost, highly-practical and has a high precision.

文章通过斜孔角度测量仪的设计，开发了一种低成本、实用性强、精度高的专用仪器。

This paper introduced the slim hole drilling designation and operation in shallow gas bearing reservoirs of Chuanxi area.

介绍了川西地区浅层天然气小眼井钻井设计与施工情况。