作业广：便携式，利于流动作业。
珠三角流动作业，最快半个小时上门，通常提前一天下单(公众假期除外)！
The pearl river delta, the fastest half an hour the door, usually one day in advance orders (except public holidays).
适用人员：管理干部、安全检察人员、通风管理人员、机电维修人员及井下流动作业人员。
The application of personnel: managers, security prosecutors, ventilation management, mechanical and electrical maintenance personnel and the underground movement of workers.
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