The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.
屯留煤矿副井井筒表土段采用普通法施工,利用井外降水井疏干降水.
互联网
Geological exploration projects are different from ordinary construction projects , especially on larger cost control difficulty.
地质勘查项目不同于一般建设项目, 成本控制难度较大.
互联网