pre-support

英 [p'riːsəp'ɔːt] 美 [p'riːsəp'ɔːt]

• 超前支护

pre-support的用法和样例：

例句

1. The advance support of intake and return aircourse needs a lot of plate girders in the comprehensive mechanized coal mining face.
   综采工作面的进回风巷超前支护要用很多板梁。