登入
選單
返回
Google圖書搜尋
Moving longwall shield supports at the York Canyon mine, Raton, N. Mex
Richard H. Oitto
David W. Wisecarver
William E. Sikes
出版
Department of the Interior, Bureau of Mines
, 1977
URL
http://books.google.com.hk/books?id=g96f6a6TfqMC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN