They are still using out-of-date equipment.
他们仍在使用陈旧的设备。
Some parts of the equipment can be considered as out-of-date but won't be changed in the near future due to their high reliability.
一些装备的部件可能被认为已经过时了,但是不要想近期去更换他们,这些老设备有着极高的可靠性,不需要更换。
But many communication equipment and techniques have been out of date.
但是很多通讯器材和技术已经过期。
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