南高供应波纹管截止阀WJ41H-150LB 不锈钢法兰连接 ¥558.00 铸钢波纹管截止阀 WJ41H-150LB 美标法兰硬密封南高销售 ¥558.00 铸钢波纹管截止阀美标WJ41H150/300/600LB硬密封法兰南高阀门 ¥558.00 WJ41H -150LB美标波纹管截止阀 密封好 耐高压 锻造南高阀门 ¥558.00 304 不锈钢法兰截止阀WJ41H-150LB 蒸汽用硬密封开关阀 ¥558.00 WJ41H-150LB、WJ41H-300LB、美标波纹管截止阀耐磨、耐腐 ¥518.00