Evidently this one was employed to mine the English Channel and harbor approaches.
这型潜艇建造目的是针对英吉利海峡以及港口布雷。
2
Traffic of new meeting harbor is very convenient, channel development is inland, refute turns on water convenient, onshore market scanty requirement is had.
新会港交通十分方便，航道深入内陆，水上转驳便捷，陆上集疏条件具备。
3
Channel refers to inland, lakes, harbor in such as the ship security navigable waters for the channel.