国产成人精品亚洲日本在线观看-么公的好大好硬好深好爽视频-无码少妇精品一区二区免费动态-一本一道中文字幕无码东京热

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.