How to retrieve all UA strings for a certain device

Hi everyone,

I am green hand of DeviceAtlas database.

One question about UA strings from JSON database: How to retrieve all UA strings for a certian device? Because I notice there may be many UA strings for some model, such as iPhone. But I can not find any API or method can retrieve these strings. What shall I do to implement this requirement?

Thank you in advance.

Leazur