______ is used to prevent the entry of sea water to the machinery space.A.A special sealin

The purpose of the wearing rings used in a centrifugal pump is to _____.A.prevent an inter

The emergency bilge suction or bilge injection valve is used to prevent _____ of the ship.

The emergency bilge suction or bilge _____ is used to prevent flooding of the ship.A.injec

According to the news item, partially hydrogenated oils are used to______.A．prevent heart

____ can be used to prevent hydraulic system overloaded or keep the pressure of oil outlet

Our government is trying to implement some ________________ to prevent the situation f