Travel China Guide: Heilongjiang Travel China Guide: Heilongjiang: Basic facts, with further coverage of Harbin and the main sights. (Heilongjiang) http://travelchinaguide.com/cityguides/heilongjiang/index.htm
Mudanjiang Hongli Chemicals Co. Ltd. Mudanjiang Hongli Chemicals Co. Ltd.: Manufacturer of oxalic acid, diethyl oxalate and tetramethyl guadinine. With technical data. (Heilongjiang) http://www.honglichem.com/
Mountain Abrasives Mountain Abrasives: Manufactures and exports green silicon carbide. (Heilongjiang) http://www.abrasive-grain.com/
Additional
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