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takaiskuventtiili form.
earth.sc., mech.eng.	swing type check valve; lift type check valve
mech.eng.	unidirectional restrictor valve; automatic non-return valve; check valve; clack valve
mech.eng., construct.	anti-syphon valve
min.prod., tech.	non-return valve; retaining valve
transp., mech.eng.	lock-over check valve

takaiskuventtiili: 5 phrases in 3 subjects

Earth sciences	1
Mechanic engineering	2
Transport	2