STAS SR ISO 1204-1990 往复内燃机.指定的旋转方向和缸盖的气瓶和阀门的标识以及引擎上发动机和位置左右手的定义
Reciprocating internai combustion engines - Designation of the direction of rotation and of cylinders and valves in cylinder heads and definition of right-hand and left-hand in line engines and location on an engine