1st Machinery Works Of North China Petroleum
[ Manufacturer ]Main business are Pipeline internal coating, Spiral-seam submerged-arc welded steel pipe, Special walking-beam pumping unit, Thread protector for drill pipe, Air Filter for Z12V 190B Diesel Engine, Diesel engine repairing series, Tanks for storing oil or water, Oil-extract
Heilongjiang Tubular Goods Manufacturing Co., Ltd.
[ Manufacturer ]Main business are Spiral seam submerged-arc welding steel tube, Corrugated expansion joint, High-frequency welding tube, Thermal insulation tube, Welding wire, Flux, etc.