If gauges are used in the following circumstances, additional device should be installed, but additional error is not allowable, otherwise amend should be done.
If gauges are used in the following circumstances, additional device should be installed, but additional error is not allowable, otherwise amend should be done.
仪表在下列情况使用时应加附加装置，但不应产生附加误差，否则应考虑修正。