bow compass [测] 弹簧圆规 ; 小圆规
giant bow compass 大型测径规
spring-bow compass 弹簧小圆规
spring bow compass 弹簧圆规
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According to the compass screwed onto the bow, Max was sailing directly for it, due north-northwest, and yet the city lights were growing fainter.
NEWYORKER: Max at Sea
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