（） is fully floating in both connecting rod small end and the piston skirt.<br>A:The piston rod<br>B:The cross head pin<br>C:The gudgeon pin<br>D:The crank-pin

（） is fully floating in both connecting rod small end and the piston skirt.
A:The piston rod
B:The cross head pin
C:The gudgeon pin
D:The crank-pin

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