petroleum drilling tools, square kellys, hexagonal kellys, heavy weight pipe, spiral heavy weight kellys, non-magnetic heavy weight pipe, drilling collars, non-magnetic drilling collars, spiral drilling collars, lifting pup joints, drill-stem sub and non-

drill collar,drill pipe,kelly,non-magnetic drill collar,integral heavy weight drill pipe,square kelly,hexagonal kelly,

stainless steel tube, slot tube, special tube, round tube, square tube, oval tube, rectangular tube, stainless steel weled pipe

seamless/welded steel pipes and tubes(octg, line pipes, boilers, heat exchangers, mechanical, square and rectangular tubes, conduit pipes, stainless, relevant pipe fittings and valves)

drill collar (dc), drill pipe (dp), heavy weight drill pipe(hwdp), square kelly, hexagonal kelly, stabilizer, hole opener, roller reamer, casing scraper, internal casing cutter, external casing cutter, marine or mechanical, key seat reamer, kelly valve

series wire mesh including welded wire mesh, square woven wire mesh, stainless steel wire mesh, hexagonal wire mesh, window screening, black woven wire cloth, brass wire mesh, expressway fences, garden fences, binding wire for construction, brass wire and aluminum wire. also iron nails, steel pipe fittings and stainless steel pipe fittings, standard work pieces, washer, wall nails, drilling nails, fiber panel nails, screwed nails, welding rod, bolts and nuts for machine, rubber products

roll forming machine, rack forming machine, keel forming machine, c/z purlin forming machine, cable tray roll forming machine, doorframe forming machine, pipe welding machine, square tube forming machine, guardrail forming machine, corrugated forming machine