If a particular instrument is consistently within tolerance, engineers may lengthen a calibration interval, which reduces the Navy's cost of ownership.

如果某台仪器总是在容许范围内，则工程师可能延长其校准间隔时间，这样能减少美国海军的成本。

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Maintenance of grinding wheel: Coolant is not required. The grinding wheel is of super-tolerance to abrasion and electroplated type, without the need for calibration or repair.

砂轮维护：不需要冷却剂。砂轮为超耐磨、电镀型，不需要校准或修复。

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This section presents two examples that illustrate the impact of component tolerance on SELT accuracy and the improvements possible via calibration.

本节用两个例子说明元件公差对SELT精确度的影响以及通过校正可能的改进。

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