No Naked Lights image

No Naked Lights

No Unauthorised Persons Beyond This Point image

No Unauthorised Persons Beyond This Point

No Entry Ventilate First image

No Entry Ventilate First

Smoking Strictly Forbidden image

Smoking Strictly Forbidden

Do Not Close image

Do Not Close

Do Not Switch On image

Do Not Switch On

No Naked Lights Beyond This Point image

No Naked Lights Beyond This Point

Open Flame And Smoking Prohibited image

Open Flame And Smoking Prohibited

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