Hongkoon koon technology ltd

http://indomonster.com/hongkongkoon

We are a leader in research and development, manufacture and sales of industrial series telephone products include: waterpoof phone, weatherproof telephone, loud-speaking telephone, bank telephone, tunnel emergency telephone, elevator telephone, prison telephone and telephone parts, etc. Applicable for subway, railway, highway call box, tunnel, power plant, petrochemicals factory, mining, dockside, iron & steel factory.

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