board and board
(nautical) side by side
Alternative form of Chorasmian
(medicine, historical) An early ultrasonographic apparatus requiring the patient to be submerged in water.
Initialism of above Ordnance Datum. Used to specify heights above mean sea level on General Arrangement and other technical drawings. Usually specified in metres, eg +62.0m.
二隻のカッターは狭い水道を横並びで航行し、帆綱がほとんど触れそうだった。
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