This is a rolled sheet (Fe) used at verious places
Galvanized Plain: metal that has been covered with a layer of zinc.
Galvanized skin pass: metal that has been “skin pass” rolled (flattened) to a given thickness range, e.g. 0.10 mm to 2.0 mm, and then galvanized.
Centigrade is the old name for the Metric measure of temperature, with 100 or centi, divisions between te freezing and boiling point of water. Celsius is the man who made the original 100 point scale, so it is named after him in honor. Both are abbreviated with a capital C.