Safety hammer shifting alarm device

The utility model relates to a safety hammer shifting alarm device, which comprises a mounting casing. A connecting hole arranged on one side of the mounting casing is communicated with a cavity of the mounting casing; positioning blocks in symmetric distribution are arranged on the side of the moun...

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Bibliographische Detailangaben
1. Verfasser:	LU HONGGEN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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