授权需要第二次签字正确的安全权限。

Authorizing requires a second signature with correct security permissions.

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修改可控：控制外发文件是否允许协作厂商对该文件进行二次编辑。未经授权，文件只能读取不能修改。

Modify control: control the outgoing file is allowed to co - operate the file for the two edit. Unauthorized, the file can only be read can not be modified.

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申请二次入境有效F（包括团体）签证须提供一类或者二类授权单位邀请函电；

To apply for repetitious valid F visa needs to provide a letter or telegram from the senior authorized organizations.

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