锯木坑
sawpit
掘坑
hole
坑
delve; hole; pit; tunnel
pits
坑厕
latrine; pit privy
坑道
sap; tunnel
坑道贫血
tunnel anemia
坑道支柱
pitprop
坑害
entrap
坑坑洼洼
bumpy; rough
坑口
pithead
坑木
pitprop
坑水
effluent
矿坑气
carburetted hydrogen
垃圾坑
cesspit
净砂
sharp sand
酒精制硼砂卡红染剂
alcoholic borax-carmine stain
旧砂
black sand; old sand
旧砂处理
sand reconditioning
旧砂复用
repeated use of sand
菌形砂心头
mushroom coreprint