滬碇

The gate threshold is a threshold structure that is stacked of a large stone or plentiful small stones and set beneath the gate underwater. It is used not only to prevent the fish swimming out of the gate and leave the pool but also to prevent the gathering effect from being affected by the tide. Moreover, the patrolmen can set the fishing net and block the gate to do fish collecting.
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Context compiled by isle.travel, 2020.

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