M'munda wa kubowola mafuta ndi chitsime chamafuta, ma welded casing amagetsi othamanga kwambiri (omwe amatchedwa ERW casing) poyerekeza ndi ma casing opanda msoko ndi olondola kwambiri, kulimba kwa weld, anti-extrusion of high-performance, ndi zabwino zotsika mtengo, zomwe wakhala akugwiritsidwa ntchito kwambiri ku mayiko akunja ...
Werengani zambiri