背はい面めん

noun, noun which may take the genitive case particle 'no'

rear; back; reverse side

Refers to the back surface or rear side of an object, often in contrast to the front. Common in technical descriptions, product specs, and spatial references.

• この機き械かいの背はい面めんには電でん源げんスイッチがあります。

  There is a power switch on the back of this machine.

• 書しょ類るいの背はい面めんに署しょ名めいしてください。

  Please sign on the reverse side of the document.