求翻译：主要包含双码流播放、客户端报警设置、客户端用户管理、摇杆设置等功能，具体功能详细介绍请查看本文档2.9 系统设置。是什么意思？

With dual-stream playback, the client alarm settings, the client user management, joystick settings, the specific functions of a 2.9 system set up to view this document.

Contains mainly dual streaming playback, client alarm settings, the user of the client management, rocker, and the ability to set up detailed information on specific features please see this document 2.9 system settings.

Mainly contains the double symbol stream broadcast, the client side reports to the police the establishment, client side functions and so on user management, rocking bar establishment, the concrete function detailed introduction please examine this documents 2.9 system establishments.

Consists primarily of two-stream playback, alarm settings, client client features such as user management, rocker set, specific features detailed introduction please see 2.9 system settings.

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