20 φ1 × P2 60° Chidori opening rate 22.6% φ5 × P8 60° Chidori opening rate 35.4% φ8 × P10 60° Chidori opening rate 57.9% □8 × P11 Chidori opening rate 52.9% □6×P9 parallel opening rate 44.4% □10 × P13 parallel opening rate 59.2% (2 × 4) Long hole x 60 ° Chidori opening rate 20.4% (3 × 10) Long hole parallel opening rate 36.0% (2 × 15) Long hole Hellingbon opening rate 35.6%
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