improver

n.

改进者，提高的人，改良物；

viscosity index improver 改善粘度添加剂；粘指剂；（机油的） 粘度指数改善剂

1. A paving asphalt penetration ratio improver was introduced.
   介绍了一种提高道路沥青针入度比的改进剂。
2. Cyclohexyl nitrate is an effective cetane number improver for diesel oil.
   硝酸环己酯是一种有效的柴油十六烷值改进剂。

A Clustal alignment improver using evolutionary algorithms
The effect of fuel cetane improver on diesel pollutant emissions
Preparation of Crude Oil Mobility Improver with Natural Grease
Ozone pre-treatment as improver of PAH removal during anaerobic digestion of urban sludge.
ETHYLENE COPOLYMER VISCOSITY INDEX IMPROVER - DISPERSANT ADDITIVE USEFUL IN OIL COMPOSITIONS
Effects of cetane number, cetane improver, aromatics and oxygenates on, heavy-duty diesel engine emissions
The determination of the flour improver potassium bromate in bread by gas chromatographic and ICP-MS methods
Effect of cetane number improver on heat release rate and emissions of high speed diesel engine fueled with ethanol–diesel blend fuel
Comparative evaluation of dry and wet carbonization of agro industrial wastes for the production of soil improver
Studies on the influence of long chain acrylic esters polymers with polar monomers as crude oil flow improver additives