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मराठी
Srpski језик 2021-05-28
8. Drugelio vožtuvasegalima pasirinkti dvigubos padėties reguliavimu, kaklo kanalu, mažu triukšmu, dujinimo reiškiniu, nedideliu kiekiu nuotėkio į atmosferą ir ėsdinančia terpe.
Naudojantdrugelio vožtuvas under special conditions, such as throttling regulation, strict sealing requirement, severe wear, low temperature (cryogenic), etc., special drugelio vožtuvas with three eccentricity or double eccentricity of specially designed metal sealing regulating device shall be used.