Several pair of ports can exchange information simultaneously on crossbar fabric, and also one port can efficiently transfer messages to several other ports on it.
交叉开关不但可以使得多个端口之间并行地进行信息的传递，也可以高效地进行一对多的多播传输。
In charge of transport, railways, highways, aviation, port, harbor, information industry, telecommunications, postal services and other work.
分管交通、铁路、公路、航空、港口、港航、信息产业、电信、邮政等方面的工作。
Owners of vessels and their agents must give vessels ETA together with other necessary information to the Port Control no later than 24 hours before vessel's arrival.
船东及其代理必须在船到前的24小时内，提供检查站船舶预到的时间和其他必要信息。
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