Beijing Aotaihua Refrigeration and air conditioning equipment Company is a domestic leading supplier of professional air conditioning and heat exchange equipment.

北京奥太华制冷空调设备有限责任公司是制冷空调换热设备的专业制造企业。

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LLUs use equipment installed in a telephone exchange by a third party company, such as Orange, instead of BT.

BBC: NEWS | Technology | Orange broadband hit by outages