We are considering buying a new residential land.

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

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

In ancient Chinese astronomy, they used the earthly branches to express time and direction.

Mr. Ochi is my best friend.

Mr. Adachi is my best friend.

Mr. Chida is my best friend.

Let's go to see a movie together.

He is involved in the development of androids.

I use a set square to draw shapes.