oc-cay-ren-trong-ren ngoai-hai-ranh-chen-nhua-bang-dong-threaded-insert-knurl-nut-brass-ep-nhua-ket-noi-ren-ngoai 20

oc cay hay con duoc goi chen nhua dai oc khia duoc lam bang dong thau ung dung cho ep nhua cong nghiep phu hop de noi hoac ep cac loai nhua pvc po pe hdpe upe ppr