求翻译：将测得的密度值作为基准密度值。将其余几条已曝光胶片装入暗盒妥善保存备用。（注：此控制胶片必须存在一黑度范围为2.0-2.5的值。）是什么意思？

The measured density value as the reference density value. The remaining few have been exposed film cassette is loaded properly save the backup. (Note: This control must exist in a black film degree range of 2.0-2.5 of the value.)

The density value will be measured density value as the benchmark. The remaining few articles will be loaded into the cassettes have been uncovered films properly preserved standby. (Note: This control film must exist for a black degree range value of 2.0 -2.5 . )

正在翻译，请等待...

The measured density value as the baseline density value. The remaining few exposed film into cassettes keep spare. (Note: this control of film there must be a black values of the range of 2-2.5. ）

正在翻译，请等待...