"容许幅度标准" can be translated as "tolerance range standard" or "allowable variation standard" in English, depending on the specific context and intended meaning.
"Tolerance range standard" emphasizes the acceptable range or limit within which a variation is permitted.
"Allowable variation standard" focuses on the permitted amount of variation from a specified value or norm.
In technical or engineering contexts, "tolerance range standard" might be more commonly used, as it directly relates to the acceptable limits of variation in measurements, dimensions, or other technical parameters. However, the choice of phrase may also depend on the industry or field in which the term is being used.