LUF (lowest usable frequency)

a bone accommodable Al Kabā'ish audit trail centrilobar pancreatitis fast array of wimpy nodes gallium alloy Gómez Rendón kickback transformer magnetic induction gyroscope Messinian Stage palaeohydrologist petrol level piezoelectric crystals pneumatic load cell source-oriented scanner spleen malpighian corpuscle swarf-penny tsunamis ultra-high speed x-autoradiography