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Vorkammer f =, -n
gen.	antechamber; channel head; stationary head
construct.	receiving chamber
health.	atrium
hydr.	forebay
mech.eng.	precombustion chamber
met.	vestibule
tech.	prechamber; surge chamber
transp.	precombustion chamber diesel engine
transp., industr.	pre-chamber
transp., mech.eng.	pre-combustion chamber

Vorkammer: 10 phrases in 4 subjects

Chemistry	3
Engines	4
General	2
Mechanic engineering	1