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"The Propagation of Sound" Various Sound PPT Courseware 3
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"The Sound of Nature" PPT
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"Feel the Sound" PPT courseware
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Classical folding fan umbrella lantern PPT material download
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"How Do We Distinguish Sounds" Sound and Environment PPT Courseware
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"It's Raining" What will the weather be like tomorrow PPT courseware
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Download the PPT courseware of "The Century of Wind and Waves" 4
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Download the PPT courseware of "The Century of Wind and Waves" 5
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Classical folding fan umbrella lantern PPT material download
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"Application of Sound Phenomenon in Science and Technology" Sound Phenomenon PPT Courseware 2
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"How We Hear Sound" Sound and Environment PPT Courseware 2
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"Application of Sound Phenomenon in Science and Technology" Sound Phenomenon PPT Courseware 2
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"Application of Sound Phenomenon in Science and Technology" Sound Phenomenon PPT Courseware 3
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"Let Sound Serve Humanity" Sound and Environment PPT Courseware
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"The Generation and Propagation of Sound" Sound Phenomenon PPT (Class Assignment)
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"The Propagation of Sound" Various Sounds PPT Courseware 4
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"Rain Talk" PPT courseware 7
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Rainwood Round Body
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