Q: Assembly を使った例文を教えて下さい。
A: The students had an assembly in the cafeteria to go over their field trip.

The tail assembly of the aircraft was not going well.

Before the press conference, the members all formed an assembly to talk.

Basically, assembly can mean to gather together as a group for a purpose, or the action of putting together parts of an object. Sorry I couldn't list many expressions, I'm not very creative.
Q: 1) Assembly hall
2) Yong specialist
3) To contain を使った例文を教えて下さい。
A: • assembly hall
1. The students gathered in the assembly hall for the principal’s announcement.
2. There is a public event at the assembly hall.

• yong specialist (do you mean “young specialist”. Yong is not a word)
1. The young specialist had just graduated.
2. I’m not sure if I want to see a young specialist. I would prefer someone with experience.

•to contain
1. It was hard to contain my excitement. (Can also be used with other emotions like anger)
2. They are struggling to contain the virus.


Q: Assembly for receiver's battery この表現は自然ですか?
A: I think you meant “assembly of receiver’s battery”.