Junior high school mathematics is surface treatment device for teaching aid

The utility model discloses a junior high school mathematics is surface treatment device for teaching aid, the on -line screen storage device comprises a base, upper end one side fixedly connected with support column of base, the upper end fixedly connected with of support column places the board, t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LOU BILIN, XUE CHAOYUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING PERFORMING OPERATIONS POLISHING TRANSPORTING
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