| 摘要 |
A chock for a small boat carried by a larger boat, to be used in the plural to carry the smaller boat on e.g., a deck and comprising a base for temporary attachment to the deck, a front short upright wall, a rear longer like wall spaced from the front wall, and a concave convex strength member between the tops of the walls. A strut extends from the juncture of the base and rear longer wall to the convex side of the concave member, the strut being in the form of a box beam of I section.
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