Mechanical device and Pantograph

Mechanical device noun - Mechanism consisting of a device that works on mechanical principles.

Pantograph and mechanical device are semantically related. In some cases you can replace term "Pantograph" with "Mechanical device", this terms are similar.

Pantograph noun - Mechanical device used to copy a figure or plan on a different scale.

Mechanical device and pantograph are semantically related. Sometimes you can use "Mechanical device" instead a noun "Pantograph".