单项选择题
The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.
A.flange
B.flash
C.plate
D.sheet
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相关考题
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单项选择题
The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?（）
A.main bearing shells
B.main bearing
C.steel
D.bearing metal -
单项选择题
The main bearing metal is a lining （）.
A.inside the bearing
B.outside the bearing
C.covering the crankshaft
D.none of the above -
单项选择题
The machine has stopped rotating because the bearing （） the shaft.
A.seized
B.clogged
C.melted
D.inserted
