单项选择题
The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.
A.the connecting rod
B.the cross-head
C.the piston rod
D.the air box
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相关考题
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单项选择题
The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A.cylinder cover
B.cross-head shoes
C.guide-ways
D.scavenging boxes -
单项选择题
The carbon deposits on the piston crown and in the ring grooves （）.
A.should be scraped
B.should be derusted
C.should be drilled out
D.to be brushed off -
单项选择题
The cap and new shell are tightened up and then removed and the thickness of the wire measured by （）.
A.a bridge gauge
B.a micrometer
C.a thermometer
D.a indicator
