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Gio trnh Van cng nghip
26/56
Van bm c ca l mt tm kim loi lin v c th xoay 90o trong chu vi vng lm kn. T l dng chy c iu chnh bng vic thay i gc ca ca van.
T l dng chy t mc ti a khi ca van nm song song vi ng ng. Van bm cng thuc loi ng m nhanh. Khi v tr m th cn tr dng chy ca ca van l nh nht do s to xoy v st p khi dng chy i qua van l rt nh.