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Let's say you have an analytical balance you need to calibrate using standard masses. Which of the following types of calibration can laboratory staff in Hong Kong conduct?
- Using a standard mass calibrated by an accredited calibration laboratory.
- Using a standard mass calibrated by a standard mass manufacturer which can be traced back to the international standard.
- Using a standard mass calibrated by a standard mass manufacturer which cannot be traced back to an international standard.
- i, ii
- i
- ii, iii
- i, iii
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