sinking pump 凿井吊泵
凿井水泵
凿井用吊泵
沉没泵
潜水泵
Sinking \Sink"ing\,
a. & n. from {Sink}.
{Sinking fund}. See under {Fund}.
{Sinking head} (Founding), a riser from which the mold is fed
as the casting shrinks. See {Riser}, n., 4.
{Sinking pump}, a pump which can be lowered in a well or a
mine shaft as the level of the water sinks.