The reference numbers are allocated in a random manner and charts in a particular area frequently do not have numbers running in sequence.
图号是随机分配的，对某一特定水域 图号不是连续的。
The reference numbers are allocated in a random manner and charts in a particular area frequently do not have numbers running in sequence.
图号是随机分配的，对某一特定水域 图号不是连续的。
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