Mapangidwe a valve ya njira imodzi ndi yosavuta, yaying'ono kukula kwake, yosavuta kugwiritsa ntchito, komanso yotsika mtengo.Amagwiritsidwa ntchito mu makina a pneumatic.Chofunika kwambiri komanso chogwiritsidwa ntchito kwambiri choyendetsa kayendedwe kake.Valavu yowongolera liwiro la njira imodzi imatha kusintha kayendedwe ka gasi komwe kamayenda mbali ina, ndipo imagwiritsidwa ntchito makamaka ...
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