Questions about example sentences with, and the definition and usage of "Lance"

A: A Lance is a kind of spear used by mounted fighters/knights/horsemen.

Wield is a somwhat outdated word for "use", but typically in reference to a weapon.
It can also be used figuratively.
Example "He wields his political power like a weapon."
He uses his political power to attack his rivals and for his benefit.

A: I'm not sure what you mean by lance tabs. It doesn't make sense to me.

A: 沒聽說過。是不是專業術語?

A: they are very similar in shape and length but a spear is thrown and doesn't have a handle/handguard, while the lance has a handle and is not thrown, but used by a man on a horse