Intercom & Telephone System · Internal Communication
Auto telephone exchange CK-1B, Auto telephone HAQ-1, Auto telephone HAG-1, Auto telephone HAG-1T, Auto telephone HAG-1TF, Auto telephone HAG-1F, Auto telephone HAT-1, Auto telephone HAG-2 by HANGZHOU HUAYAN DIGITAL ELECTRON CO.,LTD. DNV TA certificate TAA00002S4.
Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.
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