copp - cros
- copper
- copper acetate
- copper alloy
- copper bar
- copper base
- copper bath
- copper billet
- copper blast furnace
- copper bottom
- copper cake
- copper chloride
- copper coating
- copper concentrate
- copper crucible
- copper cylinder
- copper deposit
- copper dioxide
- copper dross slag
- copper etching
- copper hydroxide
- copper industry
- copper ingot
- copper intensifier
- copper leaching
- copper matte
- copper mold
- copper nickel
- copper nitrate
- copper nitride
- copper nitrite
- copper operation
- copper ore reserve
- copper oxalate
- copper oxide
- copper oxide slag
- copper plant
- copper plated cylinder
- copper plating
- copper product
- copper production
