青云翻译

After changing the use of two nuts tight spot fastening, the vacuum valve to ensure no loose,

2 nut wrapped well to tight spot welding fastening, ensure that no loosening of the vacuum valve,

After trades with 2 nuts tight, the spot welding is tight, guarantees the vacuum valve to be not loose,

For better use after 2 months immediately before the nut, spot welding fasteners vacuum valves to ensure that there is no loosening up.

2 nut wrapped well to tight spot welding fastening, ensure that no loosening of the vacuum valve,