Brinell hardness

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请教高手如何翻译下面这段：（布氏硬度）
The divisions of the micrometer scale of the microscope or other measuring devices used for the measurement of the diameter of the indentations shall be such as to permit the direct measuring of the diameter to 0.1 mm and the estimation of the diameter to 0.05 mm.

陆丰

上文翻译如下：
显微镜测微刻度盘的刻度或其他用于测量压痕直径的测量装置的测微刻度盘的刻度，应该允许直接测量0.1 毫米直径和约0.05毫米直径。