Tungsten sila, o se mea tulaga ese maualuga faatinoga, tu i fafo o le mea e filifili mo le tele o talosaga manaomia.O se mea faʻapipiʻi faʻapipiʻiina e faia i ituaiga uʻamea uʻamea, e masani ona taʻua o le tungsten carbide powder, cobalt carbide powder, n ...
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