GB/T 12459  弯头 DN 100-690ES1 k=539.

DN 100-6 90ES1 k=539.

Bl50-150RFchch406.

BL 250-150 rf4.

BL150-150 RF)-4s

wn250-150rfrch6rfn4R91 sc

WN100-600RF/RF50-11ff10150b=

bl40(b)-150m0 L=23(B)-10RF340 S=8

wn80-150RF SCH80(A)-3RFRF165555/23-96 52 S=H10S000800-░�

WN 25(B)-16 FM10-150-0.

DN