ʻO ka mea maʻamau, ua kapa ʻia nā lua me ke anawaena o 0.1mm-1.0mm he mau puka liʻiliʻi. ʻO ka hapa nui o nā mea i hoʻohana ʻia i nā ʻāpana e hoʻohana ʻia he mea paʻakikī i ka mīkini, me ka carbide cemented, ke kila kila a me nā mea ʻē aʻe molecular composite, no laila ke ʻano o ...
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