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فترة n
gen. while
econ. duration; life; run; term; time
math. period; interval
فَتْرَةُ Q-T n
med. Q-T interval (في تخطيط كهربية القلب)
فَتْرَةُ P-R n
med. P-R interval
فَتْرَة QRST n
med. QRST interval
فترة
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