Выражение встречается в следующем контексте:

These times do NOT include inertial effects associated with having to bring a slug of the essentially stagnate line contents (viz., that fluid in the portion located between the PPT™ discharge and the cross-connect with the slurry/supernatant inter-tie in the WRS portable valve box) up to speed at the start of each PPT™ pump exhaust stroke.

Заранее спасибо