Chubu chosasunthika chimapangidwa mu chidutswa chimodzi, choboola mwachindunji kuchokera kuzitsulo zozungulira, popanda ma welds pamtunda, ndipo chimakhala ndi ntchito zambiri. Chifukwa cha kukonzedwa kwapadera kwa machubu opanda zitsulo, mpweya wopangidwa ndi chitsulo, chitsulo chochepa cha alloy structural zitsulo, ndi zina zambiri zimagwiritsidwa ntchito popanga, ...
Werengani zambiri