GB/T 12459  弯头 DN 20-3.9190EL-1.0g/120592/M50

DN20-3.91 90EL-1.0g/120592/M50

lwn50-900m

WN450(B)-16 RF S=12 HG/T

WN 500-150 RF6=36hT9mRF@443RF4�0 RFSc 90E

PL 20(B)-16 RF SCH80415mآ°ذ�F

so15(a)-16 m

BL20- 2.5RF RF0RF204040FM Sc500-150 RF

pl600(a)-6rf5@PFRF-150 FF5RF2@F9@R500 R—&a

wn500-6