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bond angle of pf3
bond angle of pf3 pcl3 pbr3 pi3
bond angle of pf3 and ph3
bond angle of ph3
bond angle of bf3
bond angle of bf3 bcl3 bbr3
bond angle of bf3 and bcl3
bond angle of nf3
bond angle of if3
bond angle of nf3 ncl3 nbr3 ni3
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