Nheyo yevhavhavha 1. Izvo zviyero zvakakosha zvevhavha ndezvi: zita rekumanikidza PN uye dhayamita yezita DN 2. Basa rekutanga revhavha: cheka svikiro rakabatana, gadzirisa kuyerera, uye shandura nzira yekuyerera 3, nzira huru dzevhavha. kubatanidza ndeiyi: flange, shinda, welding, wafer 4, iyo ...
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