当重要的人员离开公司，或者硬件失败时，可能不存在安全网可用。
When key personnel leave the company or there are hardware failures, there may not be a safety net in place.
如果硬件诊断测试失败了，那么您就遇到问题了；但是，即使没有失败，也不意味着没问题。
If a hardware diagnostic test fails, then you do have a problem; however no failures does not mean there are no problems.
清单7和8显示了从硬件设施生成的失败的示例约束。
Listings 7 and 8 show sample constraint failures produced from the hardware appliance.
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