1) three times tunneling
三次成巷
2) twice accomplished laneway
二次成巷
1.
Guide hole digging and twice accomplished laneway technology;
井巷导洞掘进二次成巷技术
3) once-tunneling
一次成巷
1.
Accounting to the conditions of upper plate and the base plate of the coal bed ,the once-tunneling technique is adopted in the drilling with the whole-anchor-supporting.
根据煤层顶底板条件 ,全锚支护切眼掘进采用一次成巷工艺。
4) once-tunneling technique
一次成巷技术
5) Thrice-imaging
三次成像
6) Three-tunnel
三巷
1.
Design of Three-tunnel Drilling Local Fan Integrated Control System Based on PLC;
基于PLC控制的三巷掘进局扇集成控制系统的设计
补充资料：三次
1.三回。 2.指朝﹑野﹑市三处。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条