Check surface of EXF motor;

检查排风机电机外表面；

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Check EXF blades whether dynamic balance or not, base of motor whether tighten or not;

检查排风机扇叶是否动平衡，马达基座是否紧固；

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Check EXF blades whether dynamic balance or not, base of motor whether tighten or not;

检查排风机扇叶是否动平衡，马达基座是否紧固；

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