| 单词 | crown valve |
| 释义 | Definition of crown valve in English:crown valvenoun Engineering
OriginMid 19th century; earliest use found in John Scott Russell (1808–1882), engineer and naval architect. Definition of crown valve in US English:crown valvenoun Engineering
OriginMid 19th century; earliest use found in John Scott Russell (1808–1882), engineer and naval architect. |
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