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HAUSSER 玻璃計算盤
Counting, Chamber Neubauer-improved
TESTO 數字式溫濕度計 高精度
Digital Thermo -Hygromemter
HANNA Instruments 中濃度水硬度化學測試組(約50次測試) HI3841
Total Hardness (40-500 mg/L) MR Chemical Test Kit - HI3841