AIRUS BLOWER for COAL GAS: HDSR for Norinco Group.
The China North Industries Corporation, officially abbreviated as Norinco, is a Chinese company that manufactures vehicles (trucks, cars and motorcycles), machinery, optical-electronic products, oil field equipment, chemicals, light industrial products, explosives and blast materials, civil and military firearms and ammunition. Norinco is also involved in domestic civil construction projects.
Norinco is also known outside of China for its high-tech defense products. Norinco produces precision strike systems, amphibious assault weapons and equipment, long-range suppression weapon systems, anti-aircraft & anti-missile systems, information & night vision products, high-effect destruction systems,[2] fuel air bombs, anti-riot equipment and small arms.
https://en.wikipedia.org/wiki/Norinco
http://en.norincogroup.com.cn/art/2013/4/8/art_274_42403.html