sealed beam

名词 n.
中文释义

英文释义

名词 n.
  1. A type of electric lamp for producing a beam of light in which the filament is sealed inside a unit consisting of the reflector and lens so as to ensure the alignment of the beam and to protect the reflector from becoming dirty or tarnished.
    — The new Sealed Beam Headlights are designed to maintain substantially their initial efficiency throughout their life.

词形变化

sealed beams plural
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