Ndikupita patsogolo mosalekeza kwa kayendetsedwe kazachuma padziko lonse lapansi, kufunikira kwa machubu a carbon steel (cs chubu) kukuchulukirachulukira chaka ndi chaka.Monga zida zomwe zimagwiritsidwa ntchito popopera, machubu a zitsulo za kaboni amagwiritsidwa ntchito kwambiri m'magawo ambiri monga mphamvu, zomangamanga, ndi makampani opanga mankhwala.Komabe, pamene ...
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