circumferentor
sɜ:'kʌmfərentə
基本解释
测周器, 圆周罗盘, 地质罗盘
英文释义
n. A surveying instrument, for taking horizontal
angles and bearings; a surveyor's compass. It consists of a compass
whose needle plays over a circle graduated to 360�, and of a horizontal
brass bar at the ends of which are standards with narrow slits for
sighting, supported on a tripod by a ball and socket joint.
n. A graduated wheel for measuring tires; a tire
circle.
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