Mwachidule Mutu wa bokosi ndi chinthu chofunikira kwambiri m'zitsime zamafuta ndi gasi, zomwe zili pakati pa bowolo ndi zida zamutu. Imagwira ntchito zingapo zofunika, kuphatikiza kulumikiza zigawo zosiyanasiyana za casing, kulumikiza casing ndi chotchingira chowombera, ndikupereka chithandizo ndi kulumikizana kwa w...
Werengani zambiri