In another embodiment, {TAIL ~ the rotary slide valve} has a rotor which is formed by the crankcase and {HEAD ~ a stator} which is a ring housing 
In another embodiment , { TAIL ~ the rotary slide valve } has a rotor which is formed by the crankcase and { HEAD ~ a stator } which is a ring housing
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH