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navigational instrument used to measure the depth of a body of water (as by ultrasound or radar)

navigational instrument used to measure the depth of a body of water (as by ultrasound or radar)

navigational instrument used to measure the depth of a body of water (as by ultrasound or radar)

in the form of ultramicroscopic solid or liquid particles dispersed or suspended in air or gas

the use of ultrasonography to measure the length of the eyeball