| 单词 | mast-pocket |
| 释义 | > as lemmasmast-pocket mast-pocket n. rare a socket for the mast of a derrick-crane. ΚΠ 1884 Car-Builder's Dict. (rev. ed.) 115/1 Mast-pocket,..a heavy casting under the [wrecking] car supported by a derrick truss-rod serving as a socket for supporting the mast of a derrick to hold it upright. < as lemmas |
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