略語大辞典 [Phys] 27 mppcf millions of particles per cubic foot 1立方フィート当り100万粒子. 空気中の粒子数単位.millions of particles per cubic foot; a unitof particle number in air; [Phys:Chem:Bio:Med:Env]. 丸善「略語大辞典」JLogosID : 11861650