Lub casing yog high-end khoom ntawm steel yeeb nkab ntau lawm.Muaj ntau hom casings.Lub casing txoj kab uas hla specifications muaj li ntawm 15 pawg mus rau specifications, thiab sab nraud txoj kab uas hla yog 114.3-508mm.Cov qib steel yog J55, K55, N80 thiab L-80.11 hom P-110, C-90, C-95, T-95, ...
Nyeem ntxiv