Drawing rule for geography subject

The invention discloses a drawing rule for a geography subject. The rule comprises a straight line drawing device, the left end of the straight line drawing device is provided with an angle location device, an angle fixing device is arranged outside the angle location device, the right end of the an...

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Bibliographic Details
Main Author ZHANG LIYUN
Format Patent
LanguageChinese
English
Published 18.10.2019
Subjects
ACCESSORIES FOR WRITING OR DRAWING
ARTICLES FOR WRITING OR DRAWING UPON
BUREAU ACCESSORIES
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Summary:The invention discloses a drawing rule for a geography subject. The rule comprises a straight line drawing device, the left end of the straight line drawing device is provided with an angle location device, an angle fixing device is arranged outside the angle location device, the right end of the angle fixing device is provided with a line segment drawing device, first scale lines are arranged outside the straight line drawing device and the line segment drawing device, and length extension devices are arranged in the straight line drawing device and the line segment drawing device, through cooperation of the angle location device and the angle fixing device, the drawing rule for the geography subject has the function of a set square and an angle gauge, through cooperation of a clamping device and a conical needle, the drawing rule for the geography subject has the compasses function, according to the drawing rule for the geography subject, functions of the ruler, the set square, the angle gauge and the compa
Bibliography:Application Number: CN201910692789