Who is a Metrologist?

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Across
  1. 4. a method of determining quantity, capacity, or dimension
  2. 6. current a flow of charged particles, such as electrons or ions, moving through an electrical conductor or space
  3. 7. the process of checking a measuring instrument to see if it is accurate
  4. 9. a scientist who develops processes and systems used to measure objects
  5. 10. a single thing, person, or group that is a part of something larger
Down
  1. 1. based on or characterized by the methods and principles of science
  2. 2. the production of goods through the use of labour, machinery, tools
  3. 3. to study a subject carefully or in detail
  4. 5. to gradually grow or become bigger, more advanced, stronger
  5. 8. a particular way of doing something