Lati le mu líle dada ati wiwọ resistance ti awọn tubes onigun mẹrin 16Mn, itọju dada, gẹgẹbi ina dada, quenching dada giga-igbohunsafẹfẹ, itọju ooru kemikali, ati bẹbẹ lọ yẹ ki o gbe jade fun awọn tubes onigun mẹrin.Ni gbogbogbo, pupọ julọ ...
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