Shaanxi Senwell Petroleum Equipment Co.,Ltd   SHAANXI SENWELL PETROLEUM EQUIPMENT CO.,LTD   Shenyang Northern petroleum Group   Petroleum Offshore Trading & Service JSC   INSTITUTO MEXICANO DEL PETROLEO   Additives and Petroleum Products JS   ALHAMRANI FUCHS PETROLEUM   Hindustan Petroleum Green R&D Centre   Xi’An TianRui Petroleum Machinery Equipment Co.,Ltd   GE Petroleum Equipment Corporation LLC   Shanghai Howell Petroleum Additives Co., Ltd.   Shanghai Howell Petroleum Additives Co.,Ltd.   Shahe Ji Jin Petroleum Coke Trade Co.,Ltd   Fushun Huaxing Petroleum Chemical Co.,Ltd   Shandong Serve Petroleum Technology Co.,Ltd   China Greatwall Petroleum & Chemical Corporation   Hebei Longway Petroleum Equipment Co., Ltd.   CHINA PETROLEUM ENERGY GROUP CO., LTD.   Xi'an HL Petroleum Equipment Co., Ltd   Daqing Linqiang Petroleum&additive Co.,Ltd