单选题Piston cooling fins are located（）Aatop the piston crownBbeneath the piston crownCat the base of the piston skirtDinside the cylinder liner cooling water jacket
单选题
Piston cooling fins are located（）
A
atop the piston crown
B
beneath the piston crown
C
at the base of the piston skirt
D
inside the cylinder liner cooling water jacket
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