供应ZSXF-D对夹式软密封信号蝶阀

供应SD343H-16多层次金属硬密封伸缩蝶阀

供应SD341X-16伸缩软密封蝶阀

供应GD341X管网法兰式软密封蝶阀

供应D971X-16电动对夹衬胶蝶阀

供应D941X-16电动软密封蝶阀

供应D373H-10对夹式多层次金属硬密封蝶阀

供应D371X-10蜗轮对夹软密封蝶阀

供应D343H-16法兰式多层次金属硬密封蝶阀

供应D341X-16法兰软密封蝶阀

供应D371X-16手柄对夹软密封蝶阀

供应D341W通风蝶阀