| 单词 | return valve |
| 释义 | > as lemmasreturn valve return valve n. ΚΠ 1864 Newton's London Jrnl. Arts & Sci. 20 103 By means of the return valves, part of the water can be allowed to run back. 1954 Philos. Trans. (Royal Soc.) A. 247 75 The return valve to the pump was open so that no pressure could be generated in the vessel. 2001 Pop. Mech. June 96/3 Open the intake and return valves. < as lemmas |
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