同どう一いつ平へい面めん

noun

same plane; same level

Refers to objects or points lying on the same geometric plane or at the same height. Common in technical, mathematical, or architectural contexts.

• これらの点てんはすべて同どう一いつ平へい面めん上じょうにある。

  These points all lie on the same plane.

• 二ふたつの線せんが同どう一いつ平へい面めんに存そん在ざいするか確かく認にんしてください。

  Please check whether the two lines exist on the same plane.

noun which may take the genitive case particle 'no'

flush (with); even (with)

Describes surfaces that are perfectly level with each other, with no gap or step. Often used in construction, carpentry, or design.

• この棚たなは壁かべと同どう一いつ平へい面めんになるように取とり付つけてください。