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HANNA Instruments 專業級 pH 9.00標準液 (@25℃) 20mL x 25包 HI50009-02
Sobres de Estándar de Calibración Técnica pH 9.00 (25 x 20mL) - HI50009-02
HANNA Instruments 泛用型pH塑膠電極 - BNC HI1230B
Gel Filled PEI Body pH Electrode with BNC Connector - HI1230B