He bears a double responsibility.

Japan's heavy industry is famous worldwide.

He holds dual citizenship in America and Japan.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

An electrooculogram is a test method to record the movement of the eyeball.

He measured muscle activity using an electromyograph.

The doctor used an electrocardiograph to check the condition of my heart.

I examined muscle activity using an electromyogram.

He searched for a flashlight in the darkness.

The history of the Empire of Japan is very interesting.