[测]?弹簧分规

... 弹簧分规，小分规 bow divider 弹簧圆规，弹簧分规 spring bow instrument 弹簧两脚规，弹簧分规 hair dividers ...

?下分规

... 弹簧圆规 bow compass 下分规 bow divider 弓钻 bow drill ...