元の行データ: KB1WCQ,2019-07-25,20,FT8
デリミター: ,
$data_List[0]= KB1WCQ
$data_List[1]= 2019-07-25
$data_List[2]= 20
$data_List[3]= FT8
Array ( [0] => KB1WCQ [1] => 2019-07-25 [2] => 20 [3] => FT8 )