Constant diameter plate cam 等径确动凸轮
Plate Diameter 基片直径 ; 盘直径 ; 数粒板直径
Diameter of plate 磨抛盘直径
Diameter of face plate 花盘直径×孔径 ; 圆工作台直径
Base plate diameter 底盘直径
clutch plate diameter 离合器压盘直径
Swing diameter ofsliding plate 滑板上回转直径
Large diameter tube plate 大直径管板
Hot plate diameter 热板直径
The end of diameter plate moves along the circumference trace and its circle center is fixed.
划圆是通过直径片的端点沿圆周轨迹转动，其圆心的位置是固定的原理而实现的。
Said diameter plate composed of two pieces is installed in the slot on inner side of compasses' disk. The slide valve and turning handle are on the diameter plate for drawing circle precisely.
圆规盘内侧壁设计了直径片转动槽，直径片分两片组装进入转动槽，直径片上设计有滑动阀与转动柄，从而达到精确划圆的目的。
Usual plate gear have big diameter, but thin in depth, and have a axle hole in the center, so it can be simplified into a thin disc ring.
由于常用的盘形齿轮直径大，厚度小，且中间有较大的安装轴孔，所以可以将其简化为薄环盘，与变幅杆组成变幅器。
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