GB/T 12459  同心异径管 DN 25×15-Sch10SRC2

TPB-5 δ=4/5FM4.5rfF0-1.-Smpampam

DN 25×15-Sch10S RC2

WN150B-63rf420592

WN 50(B)-16 RF S=45 rs./ha

BL40(B)-40RF

47021RF300-1.0mpampampF/F S

WN15-16RFS=3/ RFrj&q

WN25(B)-25M ,HG/T2

bL500-16RFrf H=377)5R2161-6 RF╨░┬á╤é�G/nRFa0 RJmp;

PL350B