Your question is wrongly classified. It should be in the futures category. Now that I'm here, let me answer.

It's not just copper and rubber that are relevant. To be exact, it is copper and crude oil that push rubber.

Let's just say, for example, metal products,

Copper wire is inseparable from rubber and is widely used in industry.

Bonding force between copper-plated steel wire and rubber copper mold _ Rubber mold is widely used in ................................................. ?