单项选择题
Around the combustion chamber, all the main components are bore cooled to give low strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
A.thermal
B.mechanical
C.plastic
D.elastic
点击查看答案&解析
相关考题
-
单项选择题
Around the combustion chamber, all the main components are to give low thermal strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
A.drill cooled
B.hole cooled
C.tube cooled
D.bore cooled -
单项选择题
Top piston rings are plasma coatedIt gives added safety for the of new lines（）
A.running-in
B.running-out
C.running on
D.running down -
单项选择题
For auxiliary engines the permissible overload is （） for one hour every twelve hours.
A.10%
B.15%
C.20%
D.25%
