Pa tsiku kupanga ndondomeko, chifukwa ukalamba wa ng'anjo sintering, nayitrogeni jenereta, ammonia kuwonongeka ndi zipangizo zina, ufa zitsulo mankhwala pambuyo ng'anjo ndi mndandanda wa mavuto makutidwe ndi okosijeni monga blackening, chikasu, decarburization, ndi sandblasting pa t. ..
Werengani zambiri