Complex sentence: The all metal Ag-1 was a cantilever low wing monoplane with an unusually thick (thickness/chord 21%), constant chord wing, fitted with full span slotted flaps and slot-lip ailerons.
Split into simpler sentences: The all metal Ag-1 was a cantilever low wing monoplane with an unusually thick (thickness/chord 21%), constant chord wing. It was fitted with full span slotted flaps and slot-lip ailerons.