"Equivalent" refers to the quantity equivalent to a specific value or customary value; A chemical term used as a title for a certain proportion when substances interact.
"The number of moles of a substance" refers to the number of "substances" of a substance. "The quantity of matter" can be regarded as a quantity called "equivalent".
"The number of moles of substances in the description of invention patents can be expressed by equivalents", and it is best to express them by standard "physical quantities".
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