Absolutely knp. I guess I should elaborate. 🙂 A research team is actually just a single die roll that is expended once rolled, but the result is permanent.
Example: Germany goes after Jet Fighter construction that has a breakthrough value of 18. The German player buys 3 research teams (die rolls) that result in a 3, 5, and 2; for a total of 10. The 10 points is not enough to gain the tech, but the points rolled are permenant. On the following turn, the German player buys 3 more research teams towards Jet Fighters. This time the results are 6, 4, and 3 for a total of 13. With the previous balance of 10 the German player would have a total of 23 which exceeds the breakthrough value of 18 thus granting the player access to the Jet Fighter Tech.
We play that purchasing tech teams, and the tech rolls happen prior to purchasing units, so new techs would be available for purchase the same turn it was achieved.
As for what techs are available to each power, it’s nearly identical for each power except that each power receives a country spacific tech.
Germany: Jet Fighters
Britain: *Landing Craft
Japan: I-400 Subs w/ Aichi Bomber
Russia: Kaytusha Rockets
US: Flying Fortress Bombers
(* Although not really a British tech we find this has the best in-game application for the unit)
Hopefully, that sheds a little more light on the topic. If anyone is interested I can email some additional detailed info. Just message me with your email.