Frequency, wavelength, resolution, and depth are interlinked. These seem to be complex physics stuff to grasp, but it is worth und

超声 超声仪器 wavelength 2025-01-21 10:33  4

Now that you have persisted in understanding frequency, wavelength, resolution and depth, let us try and combine them in a meaning

超声 超声仪器 wavelength 2025-01-21 10:38  4