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4×30红膜望远镜(单筒、教学用)6×30红膜望远镜(单筒) |
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10×25兰膜望远镜(双筒) |
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8×50红膜望远镜(双筒) |
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7×35红膜望远镜(双筒) |
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7×50红膜望远镜(双筒) |
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大小潜望镜(模型) |
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单筒全铜镀金望远镜(镀金 6×50红膜) |
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生物显微镜 500X 学生显微镜 100X、200X |
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Middle school set optical probe  |
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Middle school set optical probe  |
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Eye imaging principle |
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ABC collection of optical probe,&nbs |
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