phototubes is phototube's Plural Form

phototube

US 
UK 
  • n.【无线】光电管
Plural Form:phototubes  
n.
1.
【无线】光电管

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard