D341X-6,D343H-6C,D343H-6P,D343H-6R,D341X-10,D343H-10C,蜗轮传动金属硬(软)密封蝶阀 D343H-10P,D343H-10R,D341X-16,D343H-16C,D343H-16P,D343H-16R,