...(1-6 years level) sports and health (7-12 years level) courses standard under (experimental on 转盘直径 » Dial diameter 因为你在美国上的是双语学校，所以到了这个班级，你的成绩肯定不会落后。
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The 7612-06 features a strap hanger, no flange, and bottom connect. It has a 2" dial diameter and 48" capillary length.
主要特点是一个绳子支架，无边缘，和底部联接。刻度表盘的直径是2“和管子的长度是48”
Fit the dial gauge with some preload and measure the lateral runout at the greatest external diameter of the brake disc.
在带有一定预载的情况下安装百分表，然后测量制动盘最大外径处的横向跳动。
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