Chubu chopanda phokoso chimapangidwa mu chidutswa chimodzi, chopyozedwa mwachindunji kuchokera kuzitsulo zozungulira, popanda ma welds pamtunda, ndipo imakhala ndi ntchito zambiri.Chifukwa cha kukonzedwa kwapadera kwa machubu opanda zitsulo, mpweya wopangidwa ndi chitsulo, chitsulo chochepa cha alloy structural, etc. amagwiritsidwa ntchito popanga, ...
Werengani zambiri