压边力对双焊缝差厚拼焊板拉延成形焊缝移动的影响
압변력대쌍한봉차후병한판랍연성형한봉이동적영향
Effects on Welding Seams Movement Caused of Blank Holder Force of TWBs with Double Welding Seams and Different Thicknesses on Drawing Process
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