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direct reflection

光学 gerichtete Reflexion (the reflection of rays from a surface such that all reflected rays have the same direction); regelmäßige reguläre Reflexion (the reflection of rays from a surface such that all reflected rays have the same direction); spiegelnde Reflexion; Spiegelung f (the reflection of rays from a surface such that all reflected rays have the same direction)
天文学 regelmässige Reflexion
测量仪器 Direktreflexion f
物理 gerichtete Reflexion; Spiegelung f