Buy astm a234 wpb eccentric reducer CANGZHOU ZHEN DA PIPE INDUSTRY CO., LTD was founded in 2010, it is located in Yanshan County, Hebei Province, with a favorable location which can easily accessible to Beijing and Tianjin railways and highways. It is one of the largest manufacturer specilized in producing steel pipes in Northern China. It covers an area of 100,000 square meters with a fixed...