Ground and lapped to 2 RMS finish after weld-in.
焊接装配后，进行研磨，抛光精度达到2 RMS。
Seat face Stellited, ground and lapped to a mirror finish.
钨铬钴合金面阀座，经过研磨抛光达到镜面抛光度。
Seat face Stellited, ground and lapped to a mirror finish.
阀座面为钨铬钴合金，经过研磨抛光达到镜面光洁度。
ANVIL: a small piece of ground and lapped steel attached to the frame of a micrometer; serves as a flat, fixed point from which measurements can be taken.
铁砧：一小块经过研磨和抛光的铁块，附于千分尺上面作为平直固定的测量参考点。
Seat rings are long to compensate for temperature fluctuations and are seal - welded. seating faces are hardfaced with stellite 6, ground and lapped to mirror finish.
阀座环较长，并且是密封焊接的，能够补偿温度波动。阀座面用钨铬钴合金6硬化，研磨和层叠为镜面光洁度。
Seat rings are long to compensate for temperature fluctuations and are seal - welded. seating faces are hardfaced with stellite 6, ground and lapped to mirror finish.
阀座环较长，并且是密封焊接的，能够补偿温度波动。阀座面用钨铬钴合金6硬化，研磨和层叠为镜面光洁度。
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