The application of HSE in Shanbei oil fields has ensured zero delay of man-hour, zero accident in the pit and zero apparatus and industrial accident in this working area.

健康安全环保(HSE)管理体系及其在陕北油田钻井中的应用，使该工区钻井达到了零误工时、无井下及设备事故以及没有工伤事故的目标。

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Results: Through nursing risk management, nursing safety quality was improved. The nursing dispute rate declined to 0% by 1.2%, nursing error rate to 0.2% by 2.1%, the zero accident was realized.

结果：通过护理风险管理，护理安全质量得到提高，我院护理纠纷发生率由1.2%下降至0%，护理差错发生率由2.1%下降至0.2%，实现了零事故发生。

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As far as hitting that absolute zero accident rate, Deluliis says that some shifts and mines have been accident-free for about a year.

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In conclusion, Romney might have some zero tax returns either by accident or on purposes.

FORBES: Some Zero Tax Romney Returns Would Be As Shocking As Gambling At Rick's