Through the high temperature and be become Impact resistant, wear resistance, high temperature resistance, corrosion resistance,can resist water, gasoline, alcohol, DianXieYan, acetic acid, hydrochloric acid, urine, suitable for all kinds of acid and alkali content of soil for 30 years service life by screen printing technology, the warning effect is good, don't maintain the lightweight, easy to transport installation without the recovery value, natural anti-theft.