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海外直订Automated/Mechanized Drilling and Countersinking... 机身的自动/机械化钻孔和反沉
海外直订Countersinking Handbook 穿孔手册
【4周达】Automated/Mechanized Drilling and Countersinking of Airframes [9780768076462]
【4周达】Countersinking Handbook [9780831133184]
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