Yellow Arrow-Display for telling directions<br>White line-the line in the production process laying area, and the paint line must be 5 cm thick.<br>Red line-The line in the waste area must be 5cm thick.<br>Yellow line, black line or yellow line-danger warning line, loading and unloading equipment, areas that may slip and hit.<br>Red line-the area where fire extinguishers, fire fighting equipment, flammable liquid containers, roadblocks or parking equipment are installed, and all kinds of machinery.<br>Green line-safe area, first aid tools<br>Orange line-dangerous machinery with sharp, rotatable parts.<br>Black and white alternate line-roadside traffic<br>Violet-radioactive equipment containe
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