Hlau thiab hlau raws li Hunan Great Steel Pipe lub lag luam tseem ceeb, tsim cov khoom lag luam zoo tshaj plaws thiab tus nqi ntxiv thiab txhawb nqa peb cov khoom lag luam loj, xws li carbon steel, stainless hlau thiab steel tshwj xeeb. Cov khoom tshwj xeeb: carbon seamless steel yeeb nkab, erw steel yeeb nkab, ssaw steel yeeb nkab, lsaw steel yeeb nkab, casing, tubing, laum yeeb nkab, hollow seem, yeeb nkab fittings thiab lwm yam ...