circumferentor的翻译，读音
英/sɜ:'kʌmfərentə/
释义：
测周器, 圆周罗盘, 地质罗盘
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.
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.