Penguin Liberation Front企鹅解放阵线 Payload Fairing (NASA)(NASA)的有效载荷整流罩 Pacific Legal Foundation太平洋的法律基础 Parachute Landing Fall跳伞降落下降 Points of Light Foundation光明基金会 Public Land Foundation公共土地的基础 Plant Load Factor设备负荷系数 Passenger Load Factor乘客负荷系数 Perilymphatic Fistula外淋巴瘘 Projectile-Like FragmentProjectile-Like碎片 Pathetic Little Freak可悲的小怪物 Pounds per Lineal Foot (stuctural engineering)stuctural(磅/正统的脚(工程) Public Library Foundation公共图书馆的基础 Polarization Loss Factor (antennas)极化损耗因子(天线) Palestine Liberation Front (terrorist group)巴勒斯坦解放阵线(恐怖组织)