Dates and Times provides a broad spectrum of date manipulation functionality, including calculating the difference between two dates and retrieving the local system current date and time.

Dates and Times提供了大量的日期操作功能，包括计算两个日期之间的差，以及检索本地系统的当前日期和时间。

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If 'Yes', please give details including certification system, CB name and last certification date.

如果“是”，请给出详细信息(包括认证的体系，认证公司名称及最后一次的审核日期)。

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A written detailed description of the system should be produced (including diagrams as appropriate) and kept up to date.

应当为系统准备一份书面的详细介绍(如果合适的话，要包含图纸)，并要随时更新。

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