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Chongqing Great Wall Technology Co., Ltd.
Henan Yuheng New Refractory Material Co., Ltd.
Xi'an Huayang Oil & Gas Equipment Co., Ltd.
Hunan Haozhi Technology Co.,Ltd
Ningbo Xiaosheng Magnetics Co., Ltd
Hangzhou Yingfu Industrial Co., Ltd
Jiangsu Changlong Petrochemical Equipment Co., Ltd