depolarizer
(1)消偏振镜，消偏振器
(2)退极化剂

• ozone cutoff
• ozone spectroscopy
• ozonosphere
• paassive resonant cavity
• pabry-perot mirror
• pabry-perot spectroscopy
• pace
• pacer
• pachymeter
• package sealing with laser
• packet
• packet of energy
• packing
• packing density
• packing efficiency
• packing fraction of fibre
• packing plate
• packing ring
• pad
• padder
• padding condenser
• paddle
• page composer
• pahse meter
• paint