The aim of the paper is to experimentally measure and ealuate bulk modulus of oil/steel pipe system and oil/hose system. The measurement was performed using experimental device on the basis of a measured pressure difference depending on time. Bulk modulus is evaluated from pressure change with known flow and volume of line. https://www.bekindtopets.com/great-choice-Blue-Marble-Galaxy-Buds-Skin-p33147-best-mega/