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मराठी
Srpski језик 2021-05-28
8. katup kupu-kupuedapat dipilih dalam pengaturan posisi ganda, saluran leher, kebisingan rendah, fenomena gasifikasi, sedikit kebocoran ke atmosfer dan media korosif.
Ketika menggunakankatup kupu-kupu under special conditions, such as throttling regulation, strict sealing requirement, severe wear, low temperature (cryogenic), etc., special katup kupu-kupu with three eccentricity or double eccentricity of specially designed metal sealing regulating device shall be used.