Building formwork is used in the construction site, mainly for cast-in-place concrete. The materials are divided into wooden formwork, steel formwork, bamboo formwork and mechanical pressing plate.

Plywood is a kind of thin plate with three or more layers, which is made by cutting logs into single boards or planing into thin boards and then gluing them with adhesive. Usually made of odd-numbered veneers, the fiber direction of adjacent veneers is vertically arranged and glued. So there are odd-numbered plywood with three, five and seven layers.

These two things are completely different.