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실험용 유리 기구 교체 예비 부품
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https://www.aliexpress.com/item/1005011669445016.html?pdp_npi=4%40dis%21USD%210.01%210.01%21%21%210.10%210.10%21%40210158e717714767840624016e5815%2112000056200652455%21affd%21%21%21