ASTM F1797绝缘采掘式起重机声音发射试验标准试验方法
日期:2012-02-08 13:44
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Significant sources of acoustic emission found with this test method shall be evaluated by either more refined acoustic emission test techniques or by other nondestructive methods (visual, liquid penetrant, radiography, ultrasonic, magnetic particle, etc.). Other nondestructive methods may be required in order to precisely locate defects in the digger derrick, and to estimate their size. Additional tests are outside the scope of this test method.
Defective areas found in digger derricks by
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