Instructs the reader in constructing a sensitive balance device from a wooden rod, string, cup hooks, and paper plates which can be used for experiments to determine the weight of some common objects.
"Tells how to construct a sensitive balance from a wooden rod, string, cup hooks, and paper plates, which can be used in experiments to determine the weight of some common objects."
"Instructs the reader in constructing a sensitive balance device from a wooden rod, string, cup hooks, and paper plates which can be used for experiments to determine the weight of some common objects."
"Instructs the reader in constructing a sensitive balance device from a wooden rod, string, cup hooks, and paper plates which can be used for experiments to determine the weight of some common objects."@en
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