hole shrinkage

常見例句

As a result, the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly, then stoping ore pillar by medium length hole caving method.
后溝金礦采用平底結(jié)構(gòu)淺孔留礦法先采礦房，后用中深孔崩落法回采礦柱，經(jīng)兩年多的生產(chǎn)實踐，取得較好的技術(shù)經(jīng)濟指標。
Synopsis: This paper introduces the position and characteristics of the blow hole shrinkage in the side riser of cast steel castings and probes into the formation mechanism and its prevention.
本文介紹了鑄鋼件邊冒口氣縮扎的產(chǎn)生部位及特征，并對其形成機理及防止措施進行了探討。
Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.
淺孔留礦法對急傾斜薄礦脈的礦體開采是一種有效的采礦方法，具有高效低耗與工藝簡單等優(yōu)點。