... the production of the hull, sea oil platform, platform tube contact and other structural parts. Notes: 1. Standard: GB, ... ASTM, ASME, JIS, DIN, BS, EN, ISO and relative standards are available for the customers' requirements. 2, The ... annealing, tempering, quenching, normalizing plus tempering, quenching and tempering and other delivery states are available for customers' requirements. Shipbuilding ...