如果是无动力串列驳船，本身成本几千美元，拖轮成本上万美元。十个人操纵拖轮，可以拖十艘，节省人力。

来源: easycity 于 2023-04-07 17:19:33 [旧帖] [给我悄悄话] 本文已被阅读：次

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