D373H-25C三偏心金属硬密封蝶阀

D673H-16C气动三偏心对夹硬密封蝶阀

D973H-10C电动硬密封对夹蝶阀

D373H-16C三偏心对夹式硬密封蝶阀

D373H-16C蜗轮对夹式硬密封蝶阀

D373H-10C对夹式硬密封蝶阀

D371X-10R316手动中线对夹软密封蝶阀

D371X-16P304手动中线对夹软密封蝶阀

D371X-10P手动中线对夹式橡胶密封蝶阀

D71X-20P中线对夹软密封蝶阀

D71X-16P不锈钢对夹软密封蝶阀

D71X-10P对夹式软密封蝶阀