Sentence:  Over a temperature range from 25 to 200 * * f and at pressures up to 250 atm , an <WSD>overload</WSD> of 300 psi , applied for a period of one day , results in an uncertainty in the pressure of , at most , one millimeter of mercury . 
Meaning of the word marked with <WSD> tags:  an electrical load that exceeds the available electrical power