Tongshan的用法和樣例：
例句
用作名詞 (n.)
- Sill pillared mining has been used in Tongshan Copper Mine where high tonnage of ore has been reserved in the sill pillars.
銅山銅礦采用有底柱采礦法留下的底柱礦石量較大。 - This paper briefly intro-duced the practice of longhole blast shaft-formirg method for blind shaft sinking in Tongshan Copper Mine.
本文簡(jiǎn)要介紹了深孔爆破成井法在銅山銅礦盲豎井掘進(jìn)中的實(shí)踐。
