1)plate level,圆盘水准器2)circular bubble,圆水准器3)plate level,盘式水准器4)circular level vial,圆形水准器5)Circular rod leve,圆盒水准器6)vertical circle level,垂直度盘水准器
用法例句
After the displacement between the center of the bubble and the scale circle is detected through a revised randomized Hough transform, the scale unit and the sensibility of circular bubble can be obtained.