coal humus acid的用法和样例：
- Under normal pressure and room temperature, urea humate is manufactured by coating urea with coal humus acid,with water and a few additives as its binder,also its agricultural effect is examined.
- The effect of organic expanders including humus acid, lignin,vio-lanthrone and isoviolanthrone on the performances of the lead-acid battery are described.
- For treatments of combing organic fertilizer with NPK and PK, NPK and abandoned land, the rate of humic acid carbon to humus acid carbon increased and opposite to rate of fulvic acid carbon to humus acid carbon.
- relative colour degree of humus acid
- The Protection of Humus Acid Water Treatment Agent for Heat Exchanger