DIN 标准法兰有B系列吗? din德标系列法兰标准 german standard series 标准号 通径范围 压力等级 din 2630 wn dn1200-dn2400 1 bar din 2631 wn dn10-dn3600 6 bar din 2632 wn dn200-dn3000 10 bar din 2633 wn dn10-dn2000 16 bar din 2634 wn dn200-dn1000 25 bar din 2635 wn dn10-dn500 40 bar din 2636 wn dn10-dn400 64 bar din 2637 wn dn10-dn350 100 bar din 2638 wn dn10-dn300 160 bar din 2573 pl dn10-dn500 6 bar din 2576 pl dn10-dn500 10 bar din 2527 pl dn10-dn500 6 10 16 25 40 bar din 2501 wn dn15-dn500 10 16 25 40 63 100 160 250 320 400 bar din 2566 th dn15-dn500 10 16 bar din 2655 pl dn15-dn500 0.25 0.6 1.0 1.6 2.5 4.0 bar din 2656 pl dn15-dn500 0.25 0.6 1.0 1.6 2.5 4.0 bar 德国din标准法兰 http:///html/1303.html 查看更多
backed up 怎么理解？（关于滤网）？ temporary stainless steel screens of 100 mesh or finer, backed up by perforated steel plates , should be installed to the downstream side of the jumpers for collecting dirt that will be freed during the flushing. 查看更多
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