Why is it required to unlock the picture tube and photographic bed before starting the machine?

Ensure the safety and stability of the X-ray machine. When the tube is not unlocked, the X-ray machine can't work normally to prevent the tube from being misused or damaged without authorization. When the photographic bed is not unlocked, the patient cannot place it correctly, which will lead to inaccurate examination results or harm to the patient. The unlocking tube and the photographic bed can also prevent the X-ray machine from being used by others without authorization, and ensure the safety and stability of the X-ray machine.