Screwdrivers are distinguished from each other based on their tip and what type of screw they drive. The two most common screwdriver tips are 1) the slot head screwdriver, and 2) the Phillips-head screwdriver.
Globalization broadly refers to the expansion of global linkages, the organization of social life on a global scale, and the growth of a global consciousness, hence to the consolidation of world society. Such an ecumenical definition captures much of what the term commonly means, but its meaning is disputed.
The 4-bar linkage is an adapted mechanical linkage used on bicycles. With a normal full-suspension bike the back wheel moves in a very tight arc shape. This means that more power is lost when going uphill. With a bike fitted with a 4-bar linkage, the wheel moves in such a large arc that it is moving almost vertically. linkage modeled as a network of rigid links and ideal joints is called a kinematic chain. Linkages may be constructed from open chains, closed chains, or a combination of open and closed chains. Each link in a chain is connected by a joint to one or more other links.