W9Mo3Cr4V-45钢摩擦焊近缝区不良组织及其对质量的影响
W9Mo3Cr4V-45강마찰한근봉구불량조직급기대질량적영향
Characteristics and cause of harmful structure in adjacent-weld zone of W9Mo3Cr4V/45 steel welded joint by friction welding and its influence on the quality
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