D343HD343H法(fa)蘭式(shi)蝸輪硬密封(feng)蝶(die)閥(fa)/手動(dong)蝶(die)閥(fa)
D41F、D71F手動(dong)調(tiao)節(jie)型四氟防(fang)腐蝶(die)閥(fa)供(gong)應
D343F46/D373F46蝸輪襯氟蝶(die)閥(fa)/防(fang)腐蝶(die)閥(fa) 蝶(die)閥(fa)生產(chan)
F43X-2.5扇(shan)形(xing)盲(mang)板(ban)閥 眼鏡(jing)閥(fa) 電(dian)動(dong)盲(mang)板(ban)閥