tax Query

$tax_query = array(
	'relation' => 'OR',
	array(
		'taxonomy'         => 'product_cat',
		'terms'            => array( 'construction', 'Cranes', 'dozers' ),
		'field'            => 'slug',
		'operator'         => 'IN',
		'include_children' => false,
	),
);