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"Metal Corrosion and Protection" Metal and Metal Materials PPT Courseware
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"Metal Corrosion and Protection" Metal and Metal Materials PPT Courseware
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"Materials for Building a House" PPT Courseware 2
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"Properties of Metals" Metals and Metal Materials PPT Courseware
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"Bricks, Ceramics and Porcelain" Materials around us PPT
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"Properties of Metals" Metals and Metal Materials PPT Courseware
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"Metal Materials" Metal and Metal Materials PPT Courseware 2
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"The Outbreak of Civil War" The Victory of the Chinese Revolution PPT
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"Materials Around Us" PPT Courseware 3
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"Paper" various materials PPT courseware
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"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware
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"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware
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"Materials Around Us" PPT Courseware 2
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"Materials Around Us" PPT Courseware 2
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