It is a DOT hazmat placard meaning "compressed oxygen."
True -this is for HAZMAT
If you're hauling hazmat, missing hazmat signs are a federal offense. If you're NOT hauling hazmat, you don't even need the placard frames.
The radioactive placard on a vehicle indicates that the vehicle carries some amount or regulated radioactive material.
The Dangerous When Wet placard is a square on point (or diamond) placard with white markings on a blue background. The words "Dangerous When Wet are printed across the middle, with a drawing of a flame centered in the upper corner, and the numeral four (4) in the bottom corner to indicate the Hazard Class.
The word placard (noun meaning a sign, a notice, an advertisement) has no direct antonym; the closest would be 'without placard' or 'placard-less'.
Someone has misspelled my name on this placard. A sandwich sign is a two-faced placard!
In French, "placard" is masculine.
the placard have been posted everywhere.
placard means a poster for public display. Example: there was no placard outside.
A combustible gas placard indicates the presence of gases that can ignite and burn in the event of a fire or explosion. It is used to warn individuals of the potential hazards associated with handling or transporting these gases.
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