Hot-drip galvanized Pipe Structure Greenhouse1) Material of structure: Hot-drip galvanized pipe, with zinc cover 275g/m2, excellent anti-corrosion for at least 20 years, and long service life. Simple structure, easy assembly and Economical.2) Dimension: Span Width:4m, 6m, 7m, 8m, 9m; Length:1-60m;...