， pvc suction hose pipe 4 inch .。，PVC。。。。、。4PVC，，。PVC（），，，，4ahose3 16 oxygen acetylene hose oxygen acetyleneir duct cleaning oxygen & acetylene hosevacuum hose，oxy acetylene welding hose。，，，PVC，，。，PVC。4PVC、。、PVC。。，，，air duct co3 16 oxygen acetylene hosexygen & acetylene hoseleaning vacuum hoseoxy acetylene welding hoseong>hose oxygen acetylene。PVC，，PVC，PVC，。，，。，。。PVC，、，