When the cladding thickness of rocket motor is measured with ultrasonics, the test echoes of the thin cladding will overlap in the time field.

用超声测量火箭发动机装药包覆层厚度时，当包覆层较薄时检测回波信号会出现时域混叠。

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The results show that the minimum laser specific energy, the maximum cladding thickness and the contact angle have a linear relationship with the maximum powder density per area.

结果表明，最小激光比能、最大熔覆层厚度、接触角均与最大粉末面密度呈线性关系；

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The results show that the minimum laser specific energy, the maximum cladding thickness and the contact angle have a linear relationship with the maximum powder density per area.

结果表明，最小激光比能、最大熔覆层厚度、接触角均与最大粉末面密度呈线性关系；

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