High tunnel commercial greenhouse (CMC3810)   ●Width:8.0m,   ●Length:30.0m,   ●Apex Height:2.5m   ●Wall Height：4.2m,   ●Cladding：Poly Film,   ●Pipe Diameter：Φ40,,Advantage   ●High quality steel structure and long service life,   ●The frame works structure is assembled by prefabricated parts,   ●All the greenhouses we designed are easy