at the plate

: a smooth flat thin piece of material

: forged, rolled, or cast metal in sheets usually thicker than ¹/₄ inch (6 millimeters)

: a very thin layer of metal deposited on a surface of base metal by plating

: to cover or equip with plate: such as

: to provide with armor plate

: to cover with an adherent layer mechanically, chemically, or electrically