ການຜະລິດຕົ້ນຕໍຂອງ ф 48-3620mm wall thickness 6mm-40mm reinforced grade 3PE seamless steel pipeline, oil and gas pipeline, oil and gas transmission project coated plastic pipe, coated plastic fire safety pipe, fire Protection in and outside coated plastic pipe steel, hot dip plastic power threading ທໍ່ເຫລໍກ, ທໍ່ປ້ອງກັນສາຍ.