... 6.17 直探头? normal probe 直射探头? straight beam probe 6.18 峰值频率? peak frequency ...
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General straight beam probe 普通直探头
Narrow pulse straight beam probe 窄脉冲直探头
straight beam method Normal probe 直探头
It is usually expressed by the decibels which is the straight beam probe tested the second time subtracting from the first bottom surface echo amplitude.
通常用纵波直探头测试的第几次与第一次底面回波幅度所差的分贝数表示。
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