Japan places it at a median line between the two countries, while China cites the size of its continental shelf, placing日方将边界划在两国海岸基准线的“中间线”，而中国认为应遵循“大陆架自然延伸”原则，将边界划在离日本本土更近的地区。
Results All urachal abnormalities were located in the median line of Retzius space alone the course of the urachus(n= ).果全部 例脐尿管病变均位于腹中线处Retzius间隙内的脐尿管走行区。