The test experiment shows that there are good relationship between road performance and gyratorytestingmachine design index, so, GTM has much value to popularize.
试验证明，沥青路面的表现与GTM的设计指标存在良好的相关性，因此GTM具有很好的推广价值。
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Engineers' gyratorytestingmachine (GTM) of U. s Corps was invented to solve questions which happened on flexible pavement, once used by the biggest and the most heavy bomber.