photobeam

English

photo- +‎ beam

photobeam (plural photobeams)

A beam of light whose interruption triggers a warning or a mechanism (such as a door).

单词	photobeam
释义	photobeam English Alternative forms photo beam Etymology photo- +‎ beam Noun photobeam (plural photobeams) A beam of light whose interruption triggers a warning or a mechanism (such as a door).
随便看	tutelante tutelar tutelara tutelarais tutelaram tutelaran tutelaras tutelarci tutelardes tutelare tutelarei tutelareis tutelarem tutelaremos tutelaren tutelares tutelargli tutelari tutelaria tutelariam tutelarias tutelaric tutelarie tutelaries tutelarity