Just after the point where the first bypass vacuum line 110 branches from the processing line 84, a second bypass line 112, having air valve 75 and {HEAD ~ hand valve} 73, is connected to the processing line 84 on either side of {TAIL ~ an air valve} 74 
Just after the point where the first bypass vacuum line 110 branches from the processing line 84 , a second bypass line 112 , having air valve 75 and { HEAD ~ hand valve } 73 , is connected to the processing line 84 on either side of { TAIL ~ an air valve } 74
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH