標題: ASTM E 1544-1999 階梯形砌塊的結構和固體用聲速測量系統對... [打印本頁] 作者: 兌水 時間: 2009-11-7 09:07 標題: ASTM E 1544-1999 階梯形砌塊的結構和固體用聲速測量系統對... E1544-99(2004)e1 Standard Practice for Construction of a Stepped Block and Its Use to Estimate Errors Produced by Speed-of-Sound Measurement Systems for Use on Solids