Dangerous Machine sign

Sign Description
This sign is for use in the kitchen, of hotels, restaurants, canteens etc?

The sign reads:
1. Only trained operators are allowed to use this machine.
2. Operators under training may only use this machine under skilled supervision.
3. Only persons over the age of 18 are allowed to operate or clean this machine.
4. Cheack that the guards are in place before operating.
5. Before commencing to clean or dismantle the machine, the operator must check that the power has been switched off or the power plug removed.
6. Switch off when not in use.