【名词&注释】
中心线(center line)、垂直面(vertical plane)
[单选题]轴系中心线的偏差度反映的是()的程度。
A. 垂直平面和水平平面上弯曲
B. 垂直面和水平平面上扭转
C. 任意两垂直平面上弯曲
D. 任意两垂直平面上扭转
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学习资料:
[单选题]In a diesel engine, excessive cylinder liner wear will cause ()(1) increased blow-by(2) wear between the piston ring and groove
A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. neither (1) or (2) axe correct
[单选题]Most medium and slow speed diesels are started by what medium?()
A. Electric starting motors
B. Hydraulics
C. Compressed air
D. Ether
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