Piston rings require an oil film between ring and liner and between ring and piston groove to seal against these high pressures and to prevent blowby.
为了密封，在
塞环与连杆之间、塞环与或塞槽之间需要一层油膜以承受住这些高压、
气。
(指气缸和
塞之间运动时流体的渗)Piston rings require an oil film between ring and liner and between ring and piston groove to seal against these high pressures and to prevent blowby.
为了密封，在塞环与连杆之间、塞环与或塞槽之间需要一层油膜以承受住这些高压、气。
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