Inheritance is based on the master stiffness of stiffness between the surface of the object 2, which come together to convey are driving from one object to another, which is a single object, called a driver.
Transmission using the principles of friction is the friction between the surface of the object 2, which can be used to touch each transmission, a driver from one object to another object, called a driver.
Transmission is by using the principle of the friction between the friction surface of the object 2. Which brought touch can transfer from one object is which is driving to another object, one of which is known as oils.