基于IIW标准的C80型敞车上心盘座疲劳失效研究及改进验证
기우IIW표준적C80형창차상심반좌피로실효연구급개진험증
The Fatigue Failure Research on the Upper Center Plate Seat on C80 Gondola Car Based on IIW Standard and the Demonstration of Improvement
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