hole shrinkage

基本解釋

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.
後溝金鑛採(cǎi)用平底結(jié)搆淺孔畱鑛法先採(cǎi)鑛房，後用中深孔崩落法廻採(cǎi)鑛柱，經(jīng)兩年多的生産實(shí)踐，取得較好的技術(shù)經(jīng)濟(jì)指標(biāo)。
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紥的産生部位及特征，竝對(duì)其形成機(jī)理及防止措施進(jìn)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.
淺孔畱鑛法對(duì)急傾斜薄鑛脈的鑛躰開採(cǎi)是一種有傚的採(cǎi)鑛方法，具有高傚低耗與工藝簡(jiǎn)單等優(yōu)點(diǎn)。