PP PE PC Hollow profile extrusion machine, hollow sunlight board extrusion line.Width 2100mm, thickness ... 2~20mm, environment frie PP PE PC Hollow profile extrusion machine, hollow sunlight board extrusion line.Width 2100mm, thickness ... ~20mm, environment friendly and energy saving.PP PE PC Hollow profile sheet extrusion machine, or Hollow board extrusion line, also called ...