Can other parts of cork oak be used except cork? 

The predecessor of the small cork is a large tree called European cork oak. Its scientific name is Quercus suber. It is a tree under the genus Quercus, which can grow up to 15-20 meters. It has a lush crown and branches. Roughness is the national tree of Portugal and an important economic forest that affects all mankind. Because it is often used to make corks, it is also known as "cork oak".

Can other parts of cork oak be used except cork? If so, what kind of application?

No part of Quercus variabilis will be wasted, and all its components have ecological or economic value: its fruit can be used to reproduce the next generation, used for animal feed, and edible oil; its leaves can be used for feed and Natural fertilizers; dead branches and dead wood cut from trees can be used to provide firewood and charcoal. Tannin and natural acids in Quercus variabilis wood can be used to refine chemical and beauty products.