We are classmates from the same university period.

I synchronized my smartphone and computer.

Kudo is my best friend.

Ando is my best friend.

This machine is in operation 24 hours a day.

This factory operates 24 hours a day.

He devoted everything to pursue the ways to rule.

The operation time of this machine is 8 hours a day.

This machine is running 24 hours a day.

Endo is my best friend.