GB/T 12459  弯头 DN 50-Ⅱ-690EL40

DN50-II-6 90EL40

lwn25-300RF H=120

WN80-300g0

WN850B-150 RFC

wn350(b)-40fm s=10

WN 1/2"-150 LG Sch160 S=4.55

bl450b-25rf9У�

WN800-40RF

LWN 20-300 RF550

SO50-1500 G=68120RF/u=-150 SC(b)-10rf20…Ⱐso 50(b)-16 rfb)-6rf��quot;001æ—