| 单词 | plunger case |
| 释义 | > as lemmasplunger case plunger case n. ΚΠ 1858 Sci. Amer. 21 Aug. 394/3 The movement of case, B, as shown, the plunger case, D, attached to case, C, and the seed distributing device. 1883 W. S. Gresley Gloss. Terms Coal Mining 191 Plunger case, the barrel or cylinder in which a solid piston or plunger works in a forcing sett..of pumps. < as lemmas |
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