circularityn.循环性；圆；环状circularadj.圆形的；循环的n.传单；通报circular underdrain环向盲沟circular slide rule圆计算尺circular tooth gear圆弧齿轮circular disk pitch多层微带天线circular main motion主回转运动circular exhaust box转盘式排气箱circular shelf dryer圆架干燥器circular genetic map环状遗传图Circular Mound Altar圜丘坛circular spirt level圆水准器, 圆气泡水准仪