Final answer:
Phenolic plywood is the type of plywood with a hard resin impregnated fiber overlay heat bonded to both surfaces. It is known for its high strength, durability, and resistance to moisture and chemicals.
Step-by-step explanation:
The type of plywood with a hard resin impregnated fiber overlay heat bonded to both surfaces is phenolic plywood. Phenolic plywood is made by bonding phenolic resin impregnated fibers to the surface of plywood sheets. This type of plywood is known for its high strength, durability, and resistance to moisture and chemicals.