The employee placed the removed screws on a work table to be cleaned before storing. (Normally, you must immediately take it to the designated area and count the number of screws removed.)
The staff places the removed screws on the workbench for cleaning before storage (usually requiring immediate storage in a designated area and counting the number of screws removed).
Workers put the removed screws on the workbench and wait for cleaning before storing them (usually they must be taken to the designated area for storage immediately and the number of removed screws must be counted).