['tremi]
(水下灌注混凝土用)混凝土导管, 漏斗管

Tremie \Trem"ie\, n. [F. tr['e]mie hopper.] (Hydraulic Engin.)
An apparatus for depositing and consolidating concrete under
water, essentially a tube of wood or sheet metal with a
hooperlike top. It is usually handled by a crane.
[Webster 1913 Suppl.]