During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the（）<br>A:piston skirt<br>B:pinion<br>C:crosshead<br>D:compression rings

During the power stroke of a four-stroke/cycle diesel engine, most of the side thrust of a trunk-type piston is absorbed by the（）
A:piston skirt
B:pinion
C:crosshead
D:compression rings

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