| 单词 | double floor |
| 释义 | > as lemmasdouble floor double floor n. see quot. 1842. ΚΠ 1842 J. Gwilt Encycl. Archit. ii. iii. 541 A double floor consists in its thickness of three tiers of timbers, which are called binding joists (these perform the office of girders), bridging joists, and ceiling joists. < as lemmas |
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