WIRELESS TELEPHONY.
Wireless telephony has beon installed m a colliery at Yorkshire with portable instruments to enable miners, in the event of a disaster, to communicate -with any part of the workings.
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https://paperspast.natlib.govt.nz/newspapers/HNS19130908.2.34.2
Bibliographic details
Hawera & Normanby Star, Volume LXV, Issue LXV, 8 September 1913, Page 5
Word Count
32WIRELESS TELEPHONY. Hawera & Normanby Star, Volume LXV, Issue LXV, 8 September 1913, Page 5
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