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排泄孔
gen.	drainer
auto.	drainage hole; tap; tapping hole
avia.	drain holes
dril.	escape hole; escape orifice
eng.geol.	discharge opening
met.	drain hole
repr.biol.	porus excretorius
space	bleed hole
tech.	bleeder hole; drain grating; eduction port; opening for drainage; outlet hole

排泄孔: 7 phrases in 4 subjects

Automobiles	2
Drilling	3
Nautical	1
Technology	1