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单词 pump-back
释义

> as lemmas

pump-back
pump-back n. Obsolete rare a casing over a chain-pump (see quot. 1875).
ΚΠ
1875 E. H. Knight Amer. Mech. Dict. III. 1827/2 Pump-back, a wooden casing over a chain-pump to receive the water when raised.
extracted from pumpn.1
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as lemmas
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更新时间:2025/2/24 7:38:06