| http://www.w3.org/ns/prov#value | - jective lens used to capture the image of the micro gas bubble; and n is the relative index of refraction of a liquid in which the micro gas bubble is present. [0015] Another method of measuring the diameter, distribution and so forth of micro gas bubbles and micro liquid droplets according to the present invention is a method wherein a sheet-shaped parallel laser beam is applied to a space in whi
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