类别
按端头形状
按形状过滤
PL-MP 90 Elbow
FP-FPS Straight
PL-FJS Straight
PL-FSAES Straight
PL-MP Straight
PL-FIF Straight
PL-SAE Straight
PL-Stem Straight
PL-PL Straight
PL-FP Straight
PL-MIFS Straight
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