地热井开凿工程 Project of extracting geothermal well

宽凿工 drove work

凿岩工 driller ; drill man ; machine driller

凿井工 [矿业] sinker ; sinkman ; shaftman

热工及冷工凿刀 hot and cold set

凿石工程 [矿业] stonework ; stonework west bank

木工凿 chisel for wood working

凿井工篆环 shaft sinking cycle ; sinking cycle

凿井施工测量 construction survey for shaft sinking