求翻译：固体发动机包覆层厚度检测一直是国内外研究的重点， 包覆层太厚或太薄均会影响其正常工作,因此在浇注推进剂之前,应对包覆层的厚度进行测量,以避免发动机故障。 固体发动机包覆层厚度检测一直是国内外研究的重点，在对包覆层进行厚度检测时，一般采用超声纵波对包覆层进行非接触式测量，以求不破坏火箭内部结构。本文主要讲述利用超声波纵波对固体火箭发动机进行非接触式测量。在对超声信号进行处理时，提出用解卷积法对信号通过包覆层界面的时间差进行估算，能更精确算出超声波回波在包覆层传播的时间差，提高了火箭发动机包覆层厚度测量的精确度。是什么意思？

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The solid engine inhibitor thickness examination always is the domestic and foreign research key point, the inhibitor too is thick or thin too can interfere with its normal work, therefore in front of casting propellant, should carry on the survey to the inhibitor thickness, avoids the%2

Solid rocket motor cladding thickness has been the focus of research at home and abroad, coating layer is too thick or too thin will affect its functioning, therefore before the propellant casting, coating thickness should be measured to avoid engine failures. Solid rocket motor cladding thickness h