xxx
Array
(
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        (
            [id] => 1463
            [topology] => 4<sup>4</sup>T85
            [link_rcsr] => 
            [in_col] => 4
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            [pressure] => 
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            [e_gap] => 
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            [shear_mod] => 456.7
            [vicker_hard] => 85.8
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            [publ_year] => 
            [ref] => 
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    [1] => Array
        (
            [id] => 1464
            [topology] => 4<sup>4</sup>T85
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)
xxx