In use, a drop of water to be examined is placed into the glass tubing microscope (use an eye dropper).
(a drop of water; to be examined; ) (a drop of water to be examined; is placed; into the glass tubing microscope; use an eye dropper; L:In use)
a drop of water a drop of water to be examined
to be examined is placed
into the glass tubing microscope use an eye dropper L:In use