A two-man saw is a special type of saw that requires two people to use it together to cut things like trees or logs.
Think of it like two friends who want to play see-saw, but instead of up and down, they want to cut something. One friend holds onto one end of the saw and the other holds onto the other end. They both push and pull the saw back and forth to make it cut through the thing they want to cut.
The two-man saw is special because it has teeth on both sides, so it can cut in both directions. That means the two friends can take turns pushing and pulling the saw without it getting stuck in the thing they're trying to cut.
So, to sum it up, a two-man saw is a saw that two friends use together to cut things like trees or logs. They each hold onto one end of the saw and push and pull it back and forth to make it cut.