Examlex
Cluster sampling is preferred when the objective is to increase precision.
Good Definition
An explanation or description that clearly and accurately conveys the meaning or concept of a term.
Safety Data Sheets
Documents that provide important information about the hazards of chemicals and instructions for safely handling and storing them.
Chemical Substance
Any material with a definite chemical composition, including elements and compounds.
Revolving Nosepiece
is a part of a microscope that holds multiple objective lenses and allows for easy switching between magnifications.
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