A、running-in
B、running-out
C、running on
D、running down
更多“Top piston rings are plasma coatedIt gives added safety for the of new lines（）”相关的问题
A、wide compression rings are used B、oil rings are located above the piston C、chromium plating is used on all piston rings D、oil rings are located near the bottom of the piston skirt
A、top of the piston and bottom side of head, with the piston at BDC B、piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDC C、bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placement D、top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC
A、top of the ring groove B、cylinder liner oil film C、bottom of the ring groove D、back of the ring groove
A、A.top of the ring groove B、B.back of the ring groove C、C.bottom of the ring groove D、D.piston ring end clearance
A、keep piston crown temperatures elevated for smoother combustion B、reduce the possibility of overheating the top compression ring C、help retain the heat of compression to prevent ignition delay D、help retain the heat of compression to prevent combustion knock
A、on both the external and internal top edges B、on both the external top and bottom edges C、on both the external and internal bottom edges D、on all the four edges
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