1.1通过测量蝙蝠球恢复系数（BBCOR）、推导出球出口速度比（BESR）和计算击球速度（BBS）来确定蝙蝠性能的方法。它适用于任何结构或材料的棒球和垒球球棒。试验方法提供了可用于比较目的的蝙蝠动态性能的定量测量。 1.2 BBCOR、BESR和BBS均根据实验室在满足本标准规定要求的测试设备上进行的测量进行计算。 1.3以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1这些测试方法为定量比较棒球和垒球球棒的性能提供了实验室手段。 4.2使用这些测试方法可以提供bat性能的定量指标。

1.1 A method for determining bat performance by measuring the bat-ball coefficient of restitution (BBCOR), deriving the ball exit speed ratio (BESR), and calculating a batted-ball speed (BBS). It is applicable to baseball and softball bats of any construction or material. The test methods provide quantitative measures of bat dynamic performance that may be used for comparison purposes. 1.2 The BBCOR, BESR, and BBS are each calculated from measurements taken in the laboratory on test equipment meeting the requirements defined in this standard. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 4.1 These test methods offer a laboratory means to quantitatively compare the performance of baseball and softball bats. 4.2 Use of these test methods can provide quantitative metrics of bat performance.