However, the crack detection rate and reliability of these methods need further study.
但是，这些方法的裂纹检出率和可靠性需要深入研究。
This method can apply to the detection of both crack and corrosion.
该方法同时适用于对裂纹和腐蚀缺陷的检测。
High pressure to leak detection, nitrogen into check exhaust pipe is a compressor crack.
冲入高压氮气进行检漏，查得压缩机排气管有一处出现裂缝。
And the magnetic particle detection manner for the roller shaft crack is put forward.
提出了适宜于滚子轴裂纹的磁粉探伤方式。
And the magnetic particle detection manner for the roller shaft crack is put forward.
提出了适宜于滚子轴裂纹的磁粉探伤方式。
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