The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.
- Athe crank-web
- Bthe connecting rod
- Cthe main bearing
- Dthe cross-head
问题
The lower end of each piston rod is re
参考解析：
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1、The lower section of a piston is calle
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2、The lowest ring of a piston is （）.
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3、The position of the piston parts in re
The position of the piston parts in relation to each other is secured by means of （） in the crown.Aa markBa boltCa dowel pinDa measuring tool
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4、The lower end of each piston rod is re
The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.Apiston gudgeon pinBpiston skirtCcross-headDcross-head pi
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6、The small end of the connecting rod is
The small end of the connecting rod is attached to the piston with a （）.AcrankpinBsliding wedgeCwrist pinDtorque bashing