Mechanical waves require a medium to travel through. Examples of mechanical waves are sound waves, water waves, a vibrating string. (See related link). Electromagnetic waves â¦(such as light, radio waves, X-rays, microwaves) do not need a medium to travel through, so these are not mechanical waves.
Photostat definition, a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained. a copy made with this camera.
STEP file is a CAD file format, usually used to share 3D models between users with different CAD systems. CAD file interchangeability is a huge, huge headache in the field, so it has to be make uniform. Standard ISO 10303 is trying to solve this problem. This standard is informally known as âSTEPâ, which stands for âStandard for the Exchange of Product model dataâ.