Cavitation in PUMP & NPSH detailed (FLUID machinery, centrifugal pumps, reciprocating pumps)

ASTM E 112 GRAIN SIZE MEASURING METHODS full standard, mecanical

Pantograph, Swinging/Rocking Mechanism, Geneva Mechanism

STEERING GEAR MECHANISMS (kinematics of machines)

Macro etching

Cashless Society (Cashless Economy, Online Transactions, is india moving towards Cashless society? )