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焊接原理
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焊接原理
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热处理工艺原理
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fundamentals of welding
焊接原理
被焊工件(同种或异种材质)通过加热或加压或两者并用,并且用或不用填充材料,使工件达到原子间的结合而形成永久性连接。
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p-invariant
Pinwheel Galaxy
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Pinyin Spelling Rules of Place Names in China(Section of Chinese Place Names)No.17 File in 1984 of Chinese Place Names Committee
PIN二极管
PIN光电二极管
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pin结
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pion atom
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Pioneer-0 probe
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Pioneer Bookstore
Pioneering High Energy Nuclear Interaction experiment
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pioneer plant community
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