patent log

英 美
  • 拖曳式计程仪
  • log n.原木;圆木;(航海、飞行)日志;(船)计程仪v.伐木;记入(日志)
  • patent n.专利;特许vt.给予专利权adj.专利的;显著的
Noun:
  1. a cigar-shaped log with rotary fins that measure the ship's speed