康宁corning耗材 242-20S Samco 4.0mL Sedi-Pet? 滴管, 短管,大管泡, 灭菌, 20支装 LSP Samco 500

康宁corning耗材 242-20S Samco 4.0mL Sedi-Pet? 滴管, 短管,大管泡, 灭菌, 20支装 LSP Samco 500 4000 CS