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Leading Technology (Dongtai) Co., Ltd.

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Shenzhen Longjinxiang Commercial Co., Ltd.Guangdong Sheng, China

Shaanxi Jizhilong Electrical Equipment Co., Ltd.Shaanxi Sheng, China

Shanghai Control Source Electronic Technology Co., Ltd.Shanghai Shi, China

Hilong Petroleum Group (Shanghai) Information Technology Co., Ltd.Shanghai Shi, China

Luoyang Hongli Bearing Manufacturing Co., Ltd.Henan Sheng, China

Shijiazhuang Chemical Fiber Co., Ltd.Hebei Sheng, China

Guangdong Nanfan Environmental Protection Technology Co., Ltd.Guangdong Sheng, China

PIPE&DRILLING TOOLS MANUFACTRUE CO.,LTD.