久久亚洲精品中文字幕无男同,久久久久久久久熟女av,浪荡艳妇爆乳jufd汗だく肉感,8050午夜免费级一片

application area

• Air valve steel series

  Products are mostly used in automobile, petrochemical, machinery, boiler, various engine valves and other manufacturing industries
• Electrothermal alloy series

  The products are widely used in electric heating elements, high and medium temperature resistance elements, stress measuring elements, special (artificial teeth nail) components, electric control, electric braking, telecommunications and other fields
• High temperature corrosion resistant alloy series

  It is widely used in chemical industry, petroleum, hydrometallurgy, marine development and aerospace industry
• Special welding wire series

  It is widely used in the fields of national exhibition economy such as petrochemical industry, pressure vessel, marine engineering, boiler, pipeline, vehicle, ship, aerospace, hydropower, thermal power