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地下排水沟
agric. ground drain; underdrain
bridg.constr. sub-soil drain
eng.geol. subsoil drain
hydroel.st. mole-channel
tech. blink drain; trench drain; trench drainage; underground drain
water.res. mole drain
地下排水沟
anim.husb. sub-drain
地下 排水沟: 10 phrases in 6 subjects
Agriculture1
Ecology2
General1
Hydroelectric power stations2
Hydrology1
Technology3