压强单位；在海平面和摄氏度的条件下能支持毫米汞柱。
A unit of pressure : the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade .
压强的绝对单位等于每平方厘米达因。
The absolute unit of pressure equal to one dyne per square centimeter .
压强单位