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$meta_query = array(
	array(
		array(
			'key'     => 'group_name',
			'value'   => 'Proflex 90',
			'compare' => '=',
		),
	),
	array(
		'relation' => 'OR',
		array(
			'key'     => 'group_value',
			'value'   => '7.2',
			'compare' => 'LIKE',
		),
		array(
			'key'     => 'group_value',
			'value'   => '8.6',
			'compare' => 'LIKE',
		),
	),
);