At that time the other cylinder 1 and {TAIL ~ the first flow channel} 2 and {HEAD ~ second flow channel} 3 which are connected to the other cylinder 1 are omitted 
At that time the other cylinder 1 and { TAIL ~ the first flow channel } 2 and { HEAD ~ second flow channel } 3 which are connected to the other cylinder 1 are omitted
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH