Xa kufikwa kwiivalves, i-valves yebhola ekhatywayo yinxalenye ebalulekileyo kwizicelo ezininzi. Olu hlobo lwevalve lwaziwa ngokungqinelana, ukuqina, kunye nokungasebenzi, kuyenzela ukhetho oluthandwayo kumashishini ahlukeneyo. Esi sikhokelo sibanzi, siza kuthatha i-dept ...
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