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Koehler K17770 Penetrometer Precision Needle; SS, NIST Calibration Certificate
科尔帕默中国 描述Penetrometer precision needles; stainless steel, NIST
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Koehler K20570 Penetrometer Precision Needle; SS with Brass Shank, NIST Calibration Certificate
科尔帕默中国 描述Penetrometer precision needles; SS with brass shank, NIST certified
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缓冲剂 (Disodium tetraborate), tracable to SRM from NIST and PTB pH 9.18 (25°C) CertiPUR®
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电导度水 0 mS/cm Test solution for Measurement of electrolytic Conductivity, traceable to PTB and NIST CertiPUR®
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缓冲液 (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) CertiPUR®
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缓冲液 (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) CertiPUR®
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铁 ICP 标准液 traceable to SRM from NIST, Fe(NO₃)₃ in HNO₃ 10% 10000 mg/l Fe CertiPUR®
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缓冲剂 (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) CertiPUR®
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缓冲液 (citric acid/sodium hydroxide), traceable to SRM from NIST and PTB pH 6.00 (20°C) CertiPUR®
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缓冲液 (citric acid/sodium hydroxide) traceable to SRM from NIST and PTB pH 5.00 (20°C) CertiPUR®
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