195 เลนส์วัตถุประสงค์ไม่มีสี 4X 10X 20X 40X 60X 100X สําหรับกล้องจุลทรรศน์ชีวภาพ RMS 20.2 มม.กล้องจุลทรรศน์อะไหล่

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