其提供1微米的重复精确度，这些精确的接触开关专门设计用来设定参考点，检查公差，监测，计量和校准工作。

Offering 1 micron repeat accuracy, these precision contact switches are designed for setting reference points, checking tolerances, monitoring, gauging and calibrating tasks.

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因此，OPERA团队使用了比上一次短3,000倍的质子脉冲来重复他们的实验，这样就会大大提高了中微子开始行驶时间的精确度。

Thus, the OPERA team repeated their experiment using proton pulses that were 3, 000 times briefer than last time, giving greater precision to the start time of neutrinos.

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结果：除了后方骨折块大小，所有其他指标的重复性，可信度和精确度都较差，且相关性很高。

Results: All parameters showed a poor to fair reproducibility, reliability, and accuracy except the size of the posterior fragment, where good correlations were achieved.

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