。、，。， pvc suction hose pipe 4 inch .，。PVC（），，，，。，。。，。polyurethane tflexible suction hose pipeubingcorrugated pvc hosecorrugated pvc tubingpvc corrugated flexible hose4PVC、。PVC，，，PVC，。。、，，，。，。。，polypvc corrugated flexible hose>corrcorrugated pvc tubingflexible suction hose pipestrong>ugated pvc hoseurethane tubing，，。4PVC，，，PVC。PVC，PVC，、。PVC，PVC。4，PVC。