'是', 2 => '否', ]; public static $field = ['position','title','id','code','crt_id','crt_time','size','mark','is_use','type','power', 'in_time', 'original_value', 'initial_value', 'device_type', 'total_depreciation']; const type_one = 1; const type_two = 2; const type_three = 3; public static $type = [ self::type_one => '电子设备', self::type_two => '机器设备', self::type_three => '办公设备', ]; const device_type_zero = 0; const device_type_one = 1; public static $device_type = [ self::device_type_zero => '专用设备', self::device_type_one => '公用设备', ]; }