interplanetary communication
行星际通

• homothetic figures
• hone
• Wheatstone stereoscope
• wheel
• wheel alignment
• wheel guard
• wheelhead
• wheel hub
• wheeling
• wheel rib
• wheel stand
• wheel tooth
• wheelwork
• whirling
• whirlpool
• whisker
• whisker crystal
• whisker diode
• whispering gallery effect
• whispering mode
• white heat
• white light
• white-light coronograph
• White Light Emitting Diode Lamp
• white-light fringe