阀杆和填料腔壁。精确的圆度和平直度，高级8-16RMS或镜面表面光洁度。

Stem and packing chamber walls. Close roundness, straightness and superior 8–16 RMS or burnished surface finish.

youdao

阀杆和填料腔壁。精确的圆度和平直度，高级8-16RMS或镜面表面光洁度。

Stem and packing chamber walls. Close roundness, straightness and superior 8–16 RMS or burnished surface finish.

youdao