[测]?弹簧圆规
... 外缘线,边线bounding line 弹簧圆规,小圆规bow compass 弹簧分规,小分规bow divider ...
?小圆规
... 弹簧圆规或分规 bow instrument 弹簧圆规，小圆规 bow compass 弹簧圆规，弹簧分规 spring bow instrument ...
?量规
... 浮标控制法 bouy-control method 小圆规，量规，精密小圆规 bow compass 包狄法则 Bowditch rule ...
大型测径规
弹簧小圆规
弹簧圆规
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
圆规
calliper??/??divider
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