lower roadway technology

• 落巷技术

lower roadway technology的用法和样例：

例句

1. The paper describes a commercial test of pumping stowing material for roadway rib support in a large cross-section roadway in Jinggezhuang Mine,Kailuan.
   总结了综采大断面巷道泵送高水速凝材料护巷技术在开滦荆各庄矿的工业性试验情况。