+ H20梁(工字托梁) + LVL梁 + LVL脚手架板 + 胶合板 + 定向刨花板 产品中心 Prouduct F11 LVL beam engineered framing LVL construction LVL beam I-JOIST beam I joist beam usage H20& FFP formwork H20 WOODEN BEAM H20 wood board H20 wood beam H20 FORMWORK H20 formwork project i H20 for construction <123456 >