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HANNA Instruments 平面pH電極 - BNC HI1413B
Flat Tip pH Electrode for Skin and Surfaces with BNC Connector - HI1413B
KIMBLE/NATIONAL 茶色螺蓋樣本瓶 黑蓋橡膠墊片
Vial, Sample, Screw Thread, Amber, Rubber Lined Closure