Conclusion the water fountain contamination already became a sanitation issue which should not be neglected, there are hidden safety trouble in directly drinking purified water and mineral water.

结论饮水机污染已成为不可忽视的卫生问题，所谓纯净水、矿泉水等直接饮用存在安全隐患。

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To expound OA system of enterprise is important, safety hidden trouble in use, ought to adopt safety strategy: safety keeping away means, safety manage and safety authentication.

阐述企业办公自动化系统的重要性，使用中的安全隐患，以及应该采取的安全策略：安全防范手段、安全管理和安全认证。

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Safety hidden trouble and main harm brought by mined-out areas are analyzed, and main methods and means used in detecting mined-out areas currently are summarized.

分析了采空区带来的安全隐患和主要危害，总结了当前采空区探测中使用的主要方法和手段。

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