Dezhou Zhuorui Petroleum Machinery Co., Ltd. has excellent production and testing equipment and has obtained ISO9001 quality system certification. All products of the company are produced and processed in accordance with API specifications. The "ZR" (Zhuorui) series products produced by the company are stable and reliable in quality. The products cover various continental and marine oil fields in China and are exported to multiple and regions, which have won praise from domestic and foreign market users.