ellipsograph

n.

椭圆规；

Ellipsograph
Ellipsograph
Ellipsograph
A MEW ELLIPSOGRAPH?
Ellipsograph as a drafting tool
Conjugate Ellipsograph
Ellipsograph for pantograph Patent
A Lever-type Ellipsograph
Cycloid Ellipsograph and Its Design
Combination compass and ellipsograph
A Kind of Ellipsograph Which's Long and Short Shaft's Radius' Length can be Ajusted Steplessly
Application of Ellipsograph-Mechanism in Pipe Auto-Handling Device and its Energy Consumption Computation
Note Upon a Representation in Space of the Ellipses Drawn by an Ellipsograph