Invention Grant
US09457932B2 Barrel construction 有权
桶式施工

Barrel construction
Abstract:
A barrel includes a number of wood slats that have an inner face, an outer face and side edges, grooves formed in the edges of the slats and keys that join the slats by engaging grooves in the side edges of adjacent slats, and end caps which are affixed to close the ends of the barrel.
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