Two structural forms can change under pressure to realize a water supply and drainage function of automatic quantify for a single opening.
两种结构形式均可依靠压力的变化，实现单口自动定量给排水功能。
Two structural forms can change under pressure to realize a water supply and drainage function of automatic quantify for a single opening.
两种结构形式均可依靠压力的变化，实现单口自动定量给排水功能。
应用推荐