Emhlabeni wanamuhla wezimboni osheshayo, isidingo semishini ethembekile, esebenza kahle sibaluleke kakhulu kunangaphambili.Yilapho kungena khona ivalvu yokuhlola ipuleti eliphindwe kabili ethengiswayo, esezingeni eliphezulu.Le valve entsha, eyaziwa nangokuthi i-valve yokuhlola isihlalo senjoloba noma i-wafer check valve, yenziwe ...
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