1. Yiyiphi enye enokumelana nempembelelo engcono, yg + 15 okanye yg + 20: YG15 kunye neYG20 ngamabakala amabini e-carbide enesamente.Akukho nto ilungileyo okanye imbi, kuxhomekeke ekubeni uyisebenzisa nini na.I-YG15 iqulethe malunga ne-15% ye-cobalt, inobunzima obuphezulu kune-YG20, kunye namandla angaphantsi kune-YG20.2. Yeyiphi elula kakhulu ...
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