Babban bambance-bambancen da ke tsakanin ma'aunin maganadisu da kaddarorin jiki na da'ira sune kamar haka: (1) Akwai kyawawan kayan tafiyarwa a cikin yanayi, sannan akwai kuma kayan da ke rufe halin yanzu. Misali, tsayayyar jan karfe shine 1.69 × 10-2qmm2 / m, yayin da na roba ya kai kusan sau 10 ...
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