Thus, the low thermal expansion sealing ring 60,60 and {TAIL ~ the plurality} of supporting members 70,70 used to support {HEAD ~ the sealing ring} 60,60 reduce the unwanted clearance C,C, improve efficiency and effectiveness 
Thus , the low thermal expansion sealing ring 60,60 and { TAIL ~ the plurality } of supporting members 70,70 used to support { HEAD ~ the sealing ring } 60,60 reduce the unwanted clearance C , C , improve efficiency and effectiveness
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH