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单词 sand jack
释义

sand jack

1 of 2

noun (1)

: a device consisting essentially of a sandbox and a series of plungers for gradually lowering into position a heavy weight (as a bridge section) supported by the plungers by running out the sand below

sand jack

2 of 2

noun (2)

: bluejack
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更新时间:2026/6/3 1:05:22