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Use range:

Connecting the piston and crankshaft, and the piston by the force transmitted to the crankshaft, the piston of the reciprocating motion into the crankshaft of the rotary motion. The connecting rod consists of connecting rod, connecting rod big head cover, connecting rod small head bushing, connecting rod big head bearing and connecting rod bolt (or screw) and so on. The rod group is subjected to the action of the gas from the piston pin and its own swing and the reciprocating inertia force of the piston group. The magnitude and direction of these forces are cyclical.