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… is governed by the chemical principle on which a detector tube is manufactured. Obviously, if the substance … the error on the concentration value obtained using a detector tube can be as low as 5% or as high as 50%. …
2.202
… Railway Medical Rules for Positions Critical to Safe Railway … 1.Short Title 2. Scope 3. Definitions 4. Frequency of Medical Assessments 5. Assessment for Medical Fitness for Duty 6. Medical Restrictions 7. Records …
90.985