The ball sprang back and hit him.
球弹打在他身上。
The ball sprang back and hit him.
球弹打在他身上。
The main factor of spring back density is prepressing pressure, next are compression time and compression number of times.The effect of moisture content was not significant.
弹后密度的影响要为压力,其次为加压时和压缩次数,而含水率对弹密度的影响不明显。
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