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PRESSURETIGHT BOX
3PRESSURE TIGHTEND PLATE
20'SCREWHOLE
6SIGNALLINETHROUGHPORTION
4ENDPLATE
12BOX
20'SCREW HOLE
8CONNECTINGRING
21 OIL
9PRESSURESENSITIVECRYSTAL
OPTICALFIBERCABLE
10REFERENCECRYSTAL
SIGNALLINE
5OPTICALFIBERTHROUGHPORTION
2TRANSMISSIONCIRCUIT
OPTICALFIBERCABLE
7CONNECTINGRING
5