单项选择题
Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.
A.cylinder liner
B.coupling flange
C.cylinder cover
D.piston crown
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相关考题
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单项选择题
Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
A.nuts and bolts
B.new joints
C.spring force
D.sealing rings -
单项选择题
Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.
A.throw
B.crankshaft
C.crankpin
D.crosshead -
单项选择题
During working, when the piston is near the （）, the air ignites the fine spray of fuel.
A.TDC
B.DTC
C.BDC
D.BCD
