Bear-trap dam
Bear´-trap` dam
| 1.(Engin.) A kind of movable dam, in one form consisting of two leaves resting against each other at the top when raised and folding down one over the other when lowered, for deepening shallow parts in a river. |
| 单词 | bear-trap dam | ||
| 释义 | Bear-trap damBear´-trap` dam
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