SD343H-16C 蜗轮法兰伸缩蝶阀
D71X-10P对夹软密封蝶阀
D643H-16C气动法兰式硬密封蝶阀
TD941W-1电动通风蝶阀
H42W-16P不锈钢立式止回阀
HC44X-10橡胶瓣止回阀
HH47X-10C微阻缓闭蝶型消声止回阀
H76W-16P对夹双瓣旋启式止回阀
H74W-16P 对夹圆型止回阀
