hollow dielectric wave guide
空心介质波导

• warming up
• warming up time
• warm tones
• warning
• warning device
• warning laser radar
• warning system
• warp
• wash
• washer
• washing
• washing agent
• washing/cleaning equipment
• washing solution
• waste fluid
• waste gas
• waste heat
• waste water
• watch
• watchdog
• watching
• water box
• water coolant
• water-cooled
• water cooling