所有设备均经国家无线电设备检测中心核准，通过煤监局“MA”认证。
All equipments have passed MA authentication of Coal Supervision Bureau after being approved by State Radio equipments Inspection Center.
所有设备均经国家无线电设备检测中心核准，通过煤监局“MA”认证。
All equipments have passed MA authentication of Coal Supervision Bureau after being approved by State Radio equipments Inspection Center.
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