Grading ring for preventing birds from parking

The utility model relates to the technical field of grading rings, in particular to a grading ring for preventing birds from parking, which comprises a grading ring circular ring, an anti-bird needle arranged at the upper end of the grading ring circular ring, a counterweight plate arranged below th...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CHEN QIONGNAN, CHEN BIN, MEI MING, YE XIALEI, OH JE-JIN, ZHANG LIPING, YE XIAYING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CONDUCTORS ELECTRICITY INSULATORS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
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