韩国DANHI丹海气动元件，SVH系列2位4通3位4通手动阀手转阀旋转阀手扳阀螺纹安装面板安装气动阀，型号：SVH200-02SVH202-02SVH210-02SVH212-02SVH300-03SVH302-03SVH310-03SVH312-03SVH400-04SVH402-04SVH410-04SVH400-06。)