principal axis of ellipse

acutangular as alike as two peas asbestos yarn cachacera clutch alignment double fillet welded lap joint enfreedoms gangway width hieroglyphize Luka open plan orthogonalized tight-binding method participants Pennine Alps semi-regulars silt trap thumb-sketches tiger-skins xanthomonas rubrilineans(lee et al.)starr et burk- Ziegler-Natta