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Vorkammer f =, -n
health.	oreillette f
hydr.	avant-bassin m; avant-canal m
mech.eng.	chambre de précombustion; chambre de pré-combustion
met.	vestibule m
transp., industr.	préchambre f
transp., mech.eng.	antichambre f

Vorkammer: 7 phrases in 3 subjects

Chemistry	5
Mechanic engineering	1
Medical	1