Spiral welded chitoliro (SSAW chitoliro) ndi mtundu wa zozungulira msoko zitsulo chitoliro chopangidwa ndi Mzere zitsulo koyilo ngati zopangira, amene welded ndi basi awiri-waya mbali ziwiri zowotcherera arc ndi extruded kutentha firiji. Uinjiniya wamadzi, mafakitale a petrochemical, makampani opanga mankhwala, e ...
Werengani zambiri