noun which may take the genitive case particle 'no'
placed flat; horizontally mounted; lay-flat
Describes something placed or installed in a flat, horizontal orientation, often used for equipment, packaging, or parking.
This printer can be used either placed flat or mounted on a wall.
平置きの冷凍庫は収納力が高い。
A chest freezer (horizontally placed freezer) has a large storage capacity.
Compound of 平 (flat) and 置き (placing), from the verb 置く (to place).