Mabeya a mpira wolumikizana ndi mizere iwiri amafanana ndi mabeya awiri a mpira wolumikizana ndi mzere umodzi omwe amakonzedwa kumbuyo ndi kumbuyo. Mabeya a mpira wolumikizana ndi mizere iwiri nthawi zambiri amagwiritsidwa ntchito ngati mabeya okhazikika chifukwa amatha kunyamula katundu wa axial mbali zonse ziwiri ndipo amatha kutenga katundu mwachangu. Mabeya awa ali ndi zingwe zachitsulo zokanikizidwa.
