GB/T 12459  弯头 DN 80-Sch40S90EL6tF0@/4

DN 80-Sch40S 90EL6tF0@/4

LWN150-300RF SCchF I

WN80(B)-16 RF14.271

WN150-300 RJcF Sch40Ssch1.2 h@SOJBnrf

PL50(A)-150RFrf140

WN300-16G-hK6h4006

SO 3"-150 RFT6Wf228

WN150(B)-25FM S=4.5

BI 356 sc80h400L��0

Wn20-150 RF SAH--.0RF- RF S=12amp;amp;