它利用半导体激光器为光源，光电二极管阵列接收与表面粗糙度具有对应关系的散射光带。
It USES a laser diode as light source and a linear photodiode array to record the light-scattering band, which correlated to the surface roughness.
它利用半导体激光器为光源，光电二极管阵列接收与表面粗糙度具有对应关系的散射光带。
It USES a laser diode as light source and a linear photodiode array to record the light-scattering band, which correlated to the surface roughness.
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