China Mine Safety Society Mining Safety Monitoring Technology and Equipment Professional Committee

FASING S.A. (Poland)

Wuhan Tensense Geotech Co., Ltd.

Nantong Renlong Scientific Research Instrument Co., Ltd.

Jiangsu Tuochuang Scientific Research Instrument Co., Ltd

Shanghai Iron Man Fire-fighting Equipment Co., Ltd

Laser Institute, Shandong Academy of Sciences

Henan Guanrui Industrial Co., Ltd

Shanxi Zhongke Hong'an Testing Technology Co., Ltd

Netzsh Scientific Instruments Trading (Shanghai) Co., Ltd.

Zhejiang Zhoushan Xiyun Jingye Emergency Industry Co., Ltd

Shanghai ZhiTu Environmental Protection Technology Co., Ltd.

Dekuang Jiuding (Tianjin) Technology Co., Ltd.

Under solicitation......