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单词 patent log
释义 patent log
 Naut.
 any of various devices for determining the speed of a ship by means of a vaned rotor streamed at the end of a log line upon which it exerts a torsion transmitted to a registering device on board. Also called screw log.
 [1875-80]
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更新时间:2026/6/5 15:52:12