使用方便简单，耳机声道输入。U SB直接供电。
It's easy to use, earphone track input, power supplied directly by USB.
控制系统的设备（如控制柜、操作台等）由配电柜直接供电。
Power of Control system devices such as control cabinets and OPS etc. shall be supplied by power distribution panels directly.
发电商向大用户直接供电是现阶段我国电力体制改革的一个热点问题。
Direct power supply for large customer is a hot issue in electric system reform of the present stage.
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