Ka taea e ngā peera pōro whakapā koki kotahi te rarangi te whakauru i ngā kawenga tuaka i te taha kotahi anake. Ko ngā peera me te koki whakapā o te 30° (A) 40° rānei (B) ka whakamahia te maitai pēhi, te kapia whakarewa, te whare parahi mīhini rānei, ahakoa ka whakamahia te kapia hangai mīhini, te whare kapia polyamide motuhake rānei mō ētahi mahi.
