To have an interference or force fit between mating parts, the tolerances must be such as to create a zero or negative allowance.
为了使配合零件之间具有过盈或强制配合，公差必须产生零或负允差。
To have an interference or force fit between mating parts, the tolerances must be such as to create a zero or negative allowance.
为了使配合零件之间具有过盈或强制配合，公差必须产生零或负允差。
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