請問機械設計中的公差標註如何讀？

請問機械設計中的公差標註如何讀？
例如下圖

I would try to read it as

"Diameter of, twenty, (millimeters,) with estimated errors of, plus, point, oh, one, five, and, minus, point, oh, oh, five"

or

"Diameter, twenty, plus, point, oh, one, five, and, minus, point, oh, oh, five"

in short.

曉得了，謝謝。