A.the same piston
B.the piston nearby
C.the other pistons
D.the generators on board
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A.inside
B.before
C.after
D.against
A.gap
B.clearance
C.radius
D.stroke
A.to interfere with
B.interfering with
C.to help scavenging
D.helping scavenging
A.to interfere with
B.interfering with
C.to help scavenging
D.helping scavenging
A.a starting system
B.the starting air
C.a starting operation
D.A, B and C
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