High temperature and high pressure are required to nitridate this metal.

Nitriding is often used to increase the surface hardness of metals.

It's high temperature today, it's hard to go out.

He almost died of suffocation, but fortunately he was saved.

Your cooperation is needed for this project.

I need you.

He has the ability to change into a wolf.

This metal is very hard.

In this lake, denitrification is actively taking place.

This soil is active in denitrification, releasing nitrogen into the atmosphere.