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单词
jack timber
释义
Jack timber
(Arch.)
any timber, as a rafter, rib, or studding, which, being intercepted, is shorter than the others.
See also: Jack
jack timber
jack timber
[
′jak ‚tim·bər
]
(mining engineering)
A timber such as a rafter that is shorter than others with which it is used.
jack timber
A timber in a framework which, being intercepted by some other piece, is shorter than the rest.
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更新时间:2025/7/28 1:11:27