標(biāo)題: ASTM F 2398-2004 測定棒球或壘球棒的轉(zhuǎn)動慣量和沖擊中心... [打印本頁] 作者: 兌水 時間: 2009-12-8 21:17 標(biāo)題: ASTM F 2398-2004 測定棒球或壘球棒的轉(zhuǎn)動慣量和沖擊中心... F2398-04 Standard Test Method for Measuring Moment of Inertia and Center of Percussion of a Baseball or Softball Bat