The phrase "the backrest of" is grammatically correct and can be used in written English.
It is typically used to describe the part of a piece of furniture or seat that supports the back. Example: I settled into the plush armchair, adjusting the backrest to my liking as I cracked open my book.
To keep a stable position, the backrest of the wheelchair is higher and the athletes are strapped to the wheelchair.
The gnomon of the equinoctical-shadow dial in Central Pk. is formed by the backrest of the large, semicircular exedra which seats about 30 people.
(When Shepherd reads that "Gatsby, his hands still in his pockets, was reclining against the mantelpiece in a strained counterfeit of perfect ease," Jim Fletcher, the actor who plays Gatsby, leans at a sixty-degree angle against the backrest of an office chair, deadpan).
The correct selection of the backrest of a loom is vital in producing high quality woven fabric.
NLOS is caused by the backrest of the seats, the dashboard, and/or persons sitting inside the vehicle.
The inclination of the backrest had more influence at the bottom that at the top of the backrest of the car seat, but showed little variation with position on the foam backrest.
The effect of the backrest on fore-and-aft forces on the seat depended on whether the feet were supported or not.
This is due to obstruction of the direct ray by the backrests of the various seats.
They found that changing the shed adjustment from the zero level of the backrest to higher values increased the maximum weavable weft density slightly; however, increasing the shed asymmetry further (backrest height) has no significant influence on the weave ability limit.
The passenger would float into the air strapped to the backrest portion of the seat, from which a parachute would emerge as the passenger leaves the rear of the plane.
The results for different backrest heights show that in the higher position of the backrest, the colour of the fabric become darker; and the fabric density is greater with an increasing backrest height.
