求翻译：阀座研磨的最佳效果可以通过在阀瓣上 用色笔标记后并在阀座上 轻轻的转动阀瓣来判断，一个完整的密封面接触效果应在阀座上形成一个完整的圆周。是什么意思？

The best seat grinding through the valve with color pen mark on the seat and gently turning the valve to determine a complete sealing surface contact effect on the seat to form a complete circle.

Valve seat grinding through the best you can with the clapper, and color pen to mark on the valve seat gently rotate the clapper, a complete sealing surface effects should be on the valve seat form a complete circle.

The valve seat attrition desired effect may through the gently rotary sleeve valve petal judges on the valve petal after the color pen mark and on the valve seat, a complete seal surface contact effect should form a complete circumference on the valve seat.

Seat grinding the best results by using pencil marks on the disc and on the seat after gently turning the disc to determine, effect a complete sealing contact should be in the valve seat to form a complete circle.

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