| 单词 | coffer-slide valve |
| 释义 | > as lemmascoffer-slide valve coffer-slide valve n. a box slide-valve of a steam-engine. ΚΠ 1815 J. Smith Panorama Sci. & Art II. 135 A coffer-slide valve, which requires no packing to make it steam-tight, as there is always a vacuum under it. < as lemmas |
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