目的了解广州地铁二号线开通前卫生状况并与一号线开通前进行比较。
Objective To analyze the sanitation status of Guangzhou metro 2nd line before operation, and compare it with Guangzhou metro 1st line.
介绍了数字集群系统在广州地铁二号线的应用情况，从系统构成、主要设备功能及优点等方面进行了介绍。
A digital trunked communication system is applied in Guangzhou Metro Line 2. The composition and merit points of the system and the functions of its principal equipment is introduced.
通过在广州地铁二号线鹭江折返线隧道中的实际应用，取得了良好的效果，并且受到业主和监理的充分肯定。
Its construction technology and requisition are also mainly clarified. By actual project application good effect has been obtained and wonderfully affirmed by owner and supervising person.
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