main hole meaning in English
主孔
Examples
- Since the inception of this project in 1998 , three pre - pilot holes have been completed and the main hole has reached a depth of over 3500 m
从98年开始，已经完成3个预先导孔的钻探工作，主孔钻进深度已经超过3500米。 - Southeast of the ccsd main hole , there are quite a few such reflectors , implying that eclogite bodies exist in the extension direction of the surface eclogite body
在ccsd主孔东南方深部重力高部位有多个这样的拱形反射，预示在地表陡倾榴辉岩的延伸方向还有多个一定规模的隐伏榴辉岩体。