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（）<br>A:thermal<br>B:mechanical<br>C:plastic<br>D:elastic

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

出自：海船船员证

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