Hongkong Koon Johnny Ltd.

[Guangdong China (Mainland) ]

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waterproof telephone

auto-dial industrial telephone

industrial emergency telephone

industrial sos telephone

loud speaking industrial weatherproof telephone

loud speaking industrial telephone

industrial weatherproof telephone

sos telephone

elevator telephone

elevator industrial telephone

elevator intercom system

elevator emergency telephone

elevator sos telephone

elevator sos telephone

emergency sos telephone

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