ʻO ka mea maʻamau, e hoʻopili ka ʻoihana meaʻai i ka mea ʻike metala a me nā mea ʻike X-ray i mea e ʻike ai a hōʻole i ka metala a me ka non-metallic, me ka ferrous metala (Fe), nā metala non-ferrous (Copper, Aluminum etc.) a me ke kila kila, aniani, seramika, pōhaku, iwi, paʻakikī ...
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