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世界上各大洋中最深海沟是太平洋中的馬利亚納海沟。过去一般公认世界各大洋中最深的海沟在菲律宾羣島中棉兰荖島对面的海沟。1951年丹麦的“加拉德亚”号在北緯10度24秒,东經126度40秒处測得10,540米。但根据苏联地理学会通报报导最深海沟不是菲律宾海沟,而是馬利亚納海沟,其測深經过是这样的。
The deepest trench in the oceans in the world is the Maliana trench in the Pacific Ocean. In the past it was generally accepted that the trenches, the deepest of the oceans in the world, are located in the trenches opposite the Medan Island in the Philippines. In 1951, the “Galalad” of Denmark measured 10,540 meters at 10 degrees 24 seconds north latitude and 126 degrees 40 seconds east longitude. However, according to a report by the Soviet Geographical Society, the deepest trench is not the Philippine trench, but the Maliana trench, and its sounding is like this.