无码日韩人妻AV一区二区三区,性欧美高清极品XX,欧洲亚洲一卡二卡三卡四卡,国产AV无码专区亚洲AV毛片搜

Established in 2003, Shandong Huitong Industrial Manufacturing Co., Ltd. has more than 1000 employees. It mainly produces hydraulic prop pipe, ship pipe, boiler pipe and half shaft sleeve products. It has 4 advanced hot-rolled seamless steel pipe production lines and 4 cold drawn seamless steel pipe production lines. It can produce seamless steel pipes of various specifications and materials every year. It is widely used in petroleum, electric power, chemical industry, coal industry Machinery and other fields. Our products sell well in hundreds of large and medium-sized cities in China, and are exported to India, Thailand, Vietnam, Iran, Turkey, Brazil, Egypt and other countries.