If water seal ring, should check with the stuffing at the top of the range is correct.

如有水封环，应检查其与填料函顶部的距离是否正确。

youdao

If water seal ring, should check with the stuffing at the top of the range is correct.

如有水封环，应检查其与填料函顶部的距离是否正确。

youdao