NB/T 47021  法兰 RF 900-0.6 п╟п÷п╒п┴п╟

47021 rf900-0.6 п╟п÷п╒п┴п╟

PL 25150-10 RFذ ر’ذٹ╬ذ•

WN24"-150 RF Sch40

3 FM 300-6.4 δ0

WN50-25 RF HG/=60 h=0-o

WN250-300 RF scH80/RF60@47M-16B RF

wn50-25rfs=6Fchh45011.6@47023 rfFM1100-1.0F5.5 ь╟б╟ь╟з╨ь