technique of excavation造句

例句与造句

1. The main research work include : rock split in advance by the blasting ; the rock objection explored wit ultra sonic and quality evaluation ; a new technique of excavation of a protection layer once time ; deep hole steps explosion test research ; blasting material lest ; the blasting technique research of underground engineering
   主要研究工作有：预裂爆破试验研究；声波岩体探伤及质量评价；保护层一次开挖新技术；深孔梯段爆破试验研究；爆破材料试验；地下工程开挖爆破技术研究。
2. It's difficult to find technique of excavation in a sentence. 用technique of excavation造句挺难的