Limited by the ring material, the use of butterfly valve pressure and low temperature range.

受密封圈材料的限制，蝶阀的使用压力和工作温度范围较小。

youdao

Limited by the ring material, the use of butterfly valve pressure and low temperature range.

受密封圈材料的限制，蝶阀的使用压力和工作温度范围较小。

youdao