Промышленные фильтры и фильтровальные материалы в Осло и Акерсхусе

Until recently, there were essentially only two types of glycerin on the world market: 1) Raw glycerin 30-80% (dark brown liquid, often with a distinctive odor) - this is crude crude glycerin with a high amount of impurities, including organic origin 2) Food- or pharmaceutical glycerin 95-99% is