Qhov txawv ntawm qhov loj ntawm SC thiab DN ntawm galvanized steel yeeb nkab: 1.SC feem ntau yog hais txog cov welded steel yeeb nkab, hom lus STEEL CONDUIT, yog luv luv rau cov khoom siv.2. DN yog hais txog lub nominal txoj kab uas hla ntawm galvanized steel yeeb nkab, uas yog cov yeeb nkab txoj kab uas hla ntawm lub pip ...
Nyeem ntxiv