... price!!!!! Nantong Sanzhong Pipeline Co., Ltdgreen house, garden tools,canopy, steel pipewe produce steel pipe,green house 1)WT: 0.9mm--20mm2)O ... on both ends;high power ventilator is equipped inside the house to draw out hot air with forced ventilation,which also ... , good service!Tel: 0086-513-88857885, 0086-513-88867885 green house(ISO9001:2000)