This rock drill is very efficient and can quickly cut through rock.

This area is rich in breccia.

This mountain is mainly composed of gneiss.

This area is rich in gabbro.

This mountain is made of diorite.

We should always remember the power of Kannon in difficult times.

He said, 'Where there is a will, there is a way,' and faced the difficult situation.

This mountain is mainly composed of granodiorite.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.