J641W-64P-DN32兰截止阀PP塑料工业管道碱截止阀DN25 32 40 50 65 1 ¥338.00 沪工恒J41F-10S pe塑料隔膜阀 PP手动法兰截止阀 ¥35.00 供应PP截止阀 ¥55.00 FRPP法兰截止阀 RPP截止阀 PP截止阀 耐腐蚀耐酸碱 J41F-10S手动法兰截止阀 DN50 ¥50.00 塑料阀门厂 J41F-10S PE 塑料隔膜阀 PP 手动法兰截止阀 J41F- 法兰截止阀 ¥45.00 圣隆 PPH塑料法兰截止阀 耐酸碱 PP闸阀 止断阀 截流阀 厂家直售 ¥19.80