水平钻掘工法(Horizontal Directional Drilling Method) 水平钻掘工法简称HDD工法,为铺设地下公共管线所使用之免开挖技术工法之一种,在欧美已行之有年(从1970年来),此工法被普通使用之特...
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The main problems on horizontal directional drilling method of non-excavation in the practical applications were reviewed in the paper.
论述了非开挖水平导向钻进法在实际应用中的主要问题。
An apparatus and method for a modified horizontal directional drilling assembly for drilling pipe into a drilling surface.
用于将钻杆钻入钻探面的改良型水平定向钻探组件的器械和方法。
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