Time zone teaching instrument

A time zone teaching meter comprises two parts of an external disc and an internal disc, wherein the external is 24 hours system dial, the internal disc is divided into 24 arc sectors in 15 degree, which stands for 24 time zones, each time zone stands a corresponding city, when clockwise rotating th...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	HUABIN QIN
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES PHYSICS PLANETARIA SEALS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!