Classify these types of links
DIRECT OR INDIRECT // RIGID OR FLEXIBLE
WHEEL AND TIRES
BLADE AND SHOE
ZIPPER AND FABRIC
TWO PICES OF IRON WELDED
TWO GEARS WITH CHAIN
TWO GEARS
REMOVABLE OR NON REMOVABLE // COMPLETE OR PARTIAL
SHOE TOP AND SOLE
NUT AND BOLT
WHEELS AND SHOE
DRILL AND SCREW