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term_test

// WP_Term_Query arguments
$args = array(
	'taxonomy'               => array( 'product_cat' ),
	'include'                => array( $terms ),
	'order'                  => 'ASC',
	'orderby'                => 'name',
	'meta_key'               => 'pa_manufacturer',
	'meta_value'             => '$manufacturer_terms',
);

// The Term Query
$term_query = new WP_Term_Query( $args );