○○○ vessel ▷▷▷
In 1591, the Koreans developed a vessel that would become known as a turtle ship.
http://qindex.info/i.php?x=17474
○○○ help ▷▷▷
A collection of lymph nodes and vessels that help regulate the body's defenses.
http://qindex.info/i.php?x=16434
○○○ ram ▷▷▷
The ship was designed to ram directly against enemy vessels.
http://qindex.info/i.php?x=17477
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