单选题In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）Abuild up the piston crown by metal sprayingBbuild up the cylinder head by metal sprayingCinsert shims between the crankpin bearing box and the connecting rod footDinstall a thinner head gasket
单选题
In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
A
build up the piston crown by metal spraying
B
build up the cylinder head by metal spraying
C
insert shims between the crankpin bearing box and the connecting rod foot
D
install a thinner head gasket
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