The phrase "horizontally positioned" is correct and usable in written English.
It can be used to describe the orientation or placement of an object that is aligned parallel to the horizon.
Example: "The painting was horizontally positioned on the wall, creating a sense of balance in the room."
Alternatives: "laid flat" or "aligned horizontally."
Li metal was galvanostatically electrodeposited on a horizontally positioned, downward-facing Li metal cathode in 0.5 M LiClO4-PC electrolyte.
Furthermore, an experimental device consisting of a rotating membrane disk (RMD) with horizontally positioned ion-exchange membrane is described.
The liquid boiled on top of a horizontally positioned copper heater with a diameter of 18.2 and 5 mm thickness.
A mouse was placed onto a horizontally positioned wire (1.5 mm in diameter and 15 cm in length), and the wire was placed 30 cm above the floor.
Results of the semi-analytical modelling of the interaction of laser-initiated airborne shock waves with an infinite horizontally positioned elastic plate are presented.
A mouse was placed onto a horizontally positioned wood pole (2 cm in diameter and 50 cm long), and the pole was raised gently and slowly to a 90° position.
The P3HT GNP) layer is thick enough to accommodate non-horizontally positioned GNP ribbons.
The mycotoxin solutions (in 10 % MeOH) were pipetted to the side of a near-horizontally positioned 50 ml tube (50 μl of 100 μg/ml for FB1, 125 μl of 0.1 μg/ml for OTA and 25 μl of 10 μg/ml for ZEN) and the lid carefully placed on.
For a standardized procedure of the measurements, the drag indicator of the Rolimeter was oriented horizontally and positioned on the tibial tuberosity, which was marked beforehand.
One end of a capillary was positioned horizontally inside a 0.5-ml tube (also horizontal and sealed with parafilm) to allow contact with the bacterial suspension or control solution.
The Forester continues to use Subaru's unusual flat-four "boxer" 2.5-liter engine, positioned horizontally for optimum stability.
