免费a级毛片黄a片高清在线播放,猫咪av成人永久网站在线观看 ,国产在线视频,亚洲日韩在线中文字幕综合

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