1. Ko tehea te mea he pai ake te paatete, yg+15, yg+20 ranei: Ko te YG15 me te YG20 e rua nga reanga o te carbide cimented.Kaore he pai, he kino ranei, ka whakawhirinaki ki te waa e whakamahia ana e koe.Kei roto i te YG15 te 15% cobalt, he teitei ake te pakeke i te YG20, he iti ake te kaha i te YG20.2. Ko tēhea te mea māmā ake t...
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