lift perpendicular to chord line
lift perpendicular to chord line, line from centre perpendicular to chord, perpendicular from the centre to a chord, be lifted higher chord
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lift perpendicular to chord line
line from centre perpendicular to chord
perpendicular from the centre to a chord
be lifted higher chord
lift perpendicular to chord line, line from centre perpendicular to chord, perpendicular from the centre to a chord, be lifted higher chord