The phrase "assistants placed" is correct and usable in written English.
It can be used in contexts where you are referring to the positioning or assignment of assistants in a particular role or location.
Example: "The assistants placed in the front office will handle customer inquiries and support."
Alternatives: "assigned assistants" or "deployed assistants".
His assistants placed a large picture frame between the rabbi and this reporter so that his view would be blocked.
Sokol-Hessner and two lab assistants placed some foam around my ears and lowered a plastic grille over my face.
Every day, his assistants placed him on a wrestling mat on the floor, where he rolled around and did stretches and then boxed with them.
After three young female assistants placed stencils in the shape of an eagle's wings, head and beak onto the panels, Cai, a onetime serious student of martial arts, moved gracefully as he sprinkled different grades of gunpowder, some custom-made for him.
Maccabi Ahi Nazareth's Moamen Saleh sustained an injury against Maccabi Herzliya Saturday, so medical assistants placed him on the stretcher, according to the Times of Israel.
Shortly after leaving the pharmacy, research assistants placed purchased ampoules or tablets in plastic bags with coded labeling to identify the district, pharmacy, drug purchased, form of the drug (ampoule or tablet) and number of ampoules or tablets purchased.
I used to salivate when my assistant placed a Cosmopolitan International letter on my desk.
"It sounded really important, so I thought it would be a good idea," Sophia said as a medical assistant placed a yellow crayon-shaped bandage on her arm.
Then he made fine slices in a piece of cream-colored fish resembling yellowtail and put both on a plate in front of me, as his assistant placed a dish of ponzu sauce and a bowl of bubbling hot seaweed broth beside it.
"In that skills class that particular lecture, without any preliminary orientation for parents or students, was inappropriate," Ms. Holden said, adding that Ms. Denis was withdrawn from the study skills classes and agreed to have a teaching assistant placed in her classroom.
The image wasn't perfect until an assistant placed the rat inside the tangled web of wire.
