成井 meaning in Chinese

finish a well
narii
narui

Shaft sinking by longhole blasting in complicated rock mass
复杂岩体内的深孔爆破成井
Construction technology of big diameter drainage well of group rock
基岩大口径排水井成井技术
Physical model test and study on shaft excavation by one - step deep - hole blasting
一次爆破成井物理模型试验研究
Calculation method for explosive charges in formation of shaft by blasting compaction
爆炸挤压成井药量计算研究
Technical methods to improve well completion quality in fine slit sand stratum
提高粉细砂地层成井质量的技术措施

More: Next