The lower end of each piston rod is reduced in diameter to fit a bore in （）.<br>A:the crosshead<br>B:the journals of the crosshead<br>C:the crosshead shoes<br>D:the guides

The lower end of each piston rod is reduced in diameter to fit a bore in （）.
A:the crosshead
B:the journals of the crosshead
C:the crosshead shoes
D:the guides

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