假设它是从第16个字符开始的，下面这个命令就返回第16个字符，这是文件属主名的第一个字符。

Assuming that it begins with the 16th character, the following command returns the 16th character, the first letter of the owner's name.

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所有图纸和文件上需给出业主名称(最终用户)，买方工程编码、设备位号及系统名称。

All drawings and documents shall give the name of Client (end user), Purchaser's Work No., Item No. and service of the commodity.

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