Baoji Taicheng Metal Co., Ltd.

Hangzhou Oxygen Plant Group CO., Ltd.

DJun

Zhejiang WEAJA Electronic Technology Co., Ltd.

Xi'an Yurcent Environmental Technology Co., Ltd.

Jiangsu Hongda Instrument Technology Co., LTD.

Beijing Consen Automation Technology Co., Ltd.

Wuyang Iron and Steel Co., Ltd.

INESA Scientific Instrument Co., Ltd.

Hubei Kailong Chemical Group Co., Ltd.

LANZHOU LS HEAVY EQUIPMENT CO., LTD.

Yanda (Haimen) Heavy Equipment Manufacturing Co., Ltd.

Sichuan Shutai Chemical Technology Co., Ltd.

Shandong Huasheng Rubber Group

Gansu Jinchuan Hengxin Polymer Technology Co., Ltd.

YANGZHOU LONTRIN ENERGY EQUIPMENT CO.，LTD.

Lanzhou Auxiliary Agent Plant Co.,Ltd.

Dexin Steel Tube (China) Co., Ltd.