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一种角磁场永磁电机

Year of Publication 19.04.2022
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一种防漏混凝土井盖

Year of Publication 05.12.2023
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一种收纳式扇形礼盒

Year of Publication 23.09.2025
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Novel capsule drum

by LIANG YAN, LIU MING
Year of Publication 22.11.2019
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