Ungasarudza sei zvigadzirwa zvesimbi zvefoam?
Zvinhu zvesimbi zvine furo zvine maparamita mashanu makuru: 1. Substrate yesimbi, ndiko kuti, zvinhu zvesimbi zvakagadzirwa nefuro resimbi rine maburi, zvinosanganisira nickel ine furo, mhangura, simbi, iron-nickel alloy, copper-nickel alloy, uye surface hea...
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