If they are laid so that the part of the stopper that is in the bottle is able to touch the workbench, then they can either pick up contaminants that will transfer to the liquid when replacing the stopper, or they can transfer small quantities of possibly corrosive or toxic liquids, that they have picked up when the bottle was shaken or moved, to the workbench surface that can subsequently produce a safety hazard.
lay down
laid down Neither - it's lay, the past tense of to lie.
Sure! Here's an example sentence using "laid down": "After a long day at work, I laid down on the couch to relax."
The past tense of "lay down" is "laid down."
do we follow the principles laid down by quaid
who laid down the basic foundation for the science of genetics
She laid the book on the table before leaving the room.
The Harland & Wolff shipyard no. 401on March 31st 1909 Titanic's keel was laid down
Laid So Low - Tears Roll Down - was created in 1991.
When sediment is laid down, this is known as deposition. The sediment is unconsolidated and so it is not (yet) a rock.
They LIE down (to lie, lay, lain). LAY the table, please! (to lay, laid, laid).
efficiency and productivity depend on an effective procedure which can only exist on foundational laid down processes.