photoconductive ceramics
光电导陶瓷

• watching
• water box
• water coolant
• water-cooled
• water cooling
• water ga[u]ge
• water glass
• water immersion
• water-immersion system
• water level
• water level ga[u]ge
• waterline
• water-of-ayr stone
• waterproof
• water tight
• water-vapor laser
• water-vapor plasma
• water vapo[u]r
• water vapo[u]r absorption
• Watson's lemma
• watt
• wattage
• watt-hour
• watt-hour meter
• wattmeter