• 1. Longitudinal wave probe: 纵波探头
• 2. small angle longitudinal wave probe: 小角度纵波探头
• 3. longitudinal wave angle probe: 纵波斜探头

• 1.The experiment results indicted that there existed fairly good linearity between the grain sizes and longitudinal wave velocities when the measurements were done with 5p14z probe.
  实验结果表明，用5 P 14 Z探头测得的纵波声速与晶粒尺寸之间有很好的线性关系。
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