Industry technology

One-Time Techs

Name	Prerequisite	Difficulty	Research Bonus	Year	Knowledge on Completion	Effects
Advanced Construction Engineering	Industrial Efficiency - 3 Industrial Production - 3	2	Mechanical Engineering Theory 0.5 Construction Practical 0.5	1938	Mechanical Engineering Theory	Infrastructure - Activated
Atomic Research		10	Nuclear Physics 1.0	1936	Nuclear Physics	None
Census Tabulation Machine		2	Mechanical Engineering Theory 1.0	1936	Mechanical Engineering Theory	Research Efficiency +2%
Construction Engineering		2	Mechanical Engineering Theory 0.5 Construction Practical 0.5	1918	Mechanical Engineering Theory	Industrial Capacity - Activated
Electronic and Mechanical Engineering		2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory 0.5	1926	Electronic Engineering Theory	None
Isotope Separation	Nuclear Research	10	Nuclear Physics 1.0	1942	Nuclear Physics	None
Nuclear Research	Atomic Research	10	Nuclear Physics 1.0	1940	Nuclear Physics	None
Radio Detection Equipment	Radio Technology	2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory 0.5	1936	Electronic Engineering Theory	Allow radar installations to work as listening stations
Radios	Radio Technology	2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory 0.5	1936	Electronic Engineering Theory	Combat Efficiency +10% Encryption Ability -0.2
Radio Technology	Electronic and Mechanical Engineering	2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory 0.5	1930	Electronic Engineering Theory	None
Rocket Engine	Rocket Tests Rocket Test Site in Any Owned Province	4	Rocket Science 1.0	1936	Rocket Science	Rocket Test Site - Activated
Rocket Tests		4	Rocket Science 1.0	1939	Rocket Science	None
Theoretical Jet Engine	Rocket Engine	4	Rocket Science 1.0	1939	Jet Engine Theory	None

Scaled Techs

Maximum level of 12

Name	Prerequisite	Difficulty	Research Bonus	Start Year	First Offset	Additional Offset	Knowledge on Completion	Effects
Agriculture		1	Mechanical Engineering Theory 1.0	1918	1932	2	Mechanical Engineering Theory	Manpower +10%
Civil Defence		5	Land Combat Experience 1.0	1936	1939	3	Land Combat Experience	Repair Rate +5%
Civil Nuclear Research	Isotope Separation	10	Nuclear Physics 1.0	1943	1944	1	Nuclear Physics	Nuclear Reactor - Activated
Coal Processing Technologies		5	Chemical Engineering 1.0	1936	1938	3	Chemical Engineering	Energy Production +5%
Coal to Oil Conversion		5	Chemical Engineering 1.0	1936	1938	3	Chemical Engineering	Energy to Oil +10%
Combat Medicine		2	Land Combat Experience 1.0	1938	1939	3	Land Combat Experience	Casualty Trickleback +1%
Decryption Machine	Mechanical Computing Machine - 1 OR (Electronic Computing Machine AND Decryption Machine < 3)	2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory +0.5	1938	1940	3	Electronic Engineering Theory	Decryption Ability +0.1
Education		5	Land Combat Experience 1.0	1936	1938	3	Land Combat Experience	Leadership +5%
Electronic Computing Machine	Mechanical Computing Machine - 2	4	Electronic Engineering Theory 1.0	1941	1943	3	Electronic Engineering Theory	Research Efficiency +5%
Encryption Machine	Mechanical Computing Machine - 1 OR (Electronic Computing Machine AND Decryption Machine < 3)	2	Electronic Engineering Theory 0.5 Mechanical Engineering Theory +0.5	1938	1940	3	Electronic Engineering Theory	Encryption Ability +0.1
First Aid		2	Land Combat Experience 1.0	1938	1939	3	Land Combat Experience	Attrition -5%
Heavy AA guns		2	Artillery Practical 0.7 Artillery Theory 0.3	1918	1936	3	Artillery Theory	Anti-Aircraft Guns - Activated Provincial AA Efficiency +20%
Industrial Efficiency		2	Mechanical Engineering Theory 0.5 Construction Practical +0.5	1918	1932	2	Mechanical Engineering Theory	IC Efficiency +2.5%
Industrial Production		2	Mechanical Engineering Theory 0.5 Construction Practical +0.5	1918	1932	2	Mechanical Engineering Theory	IC +2.5%
Oil Refining		5	Chemical Engineering 1.0	1936	1938	3	Chemical Engineering	Refining Efficiency +10%
Mechanical Computing Machine	Census Tabulation Machine	3	Mechanical Engineering Theory 1.0	1938	1940	3	Mechanical Engineering Theory	Research Efficiency +2%
RADAR	Radio Technology	3	Mechanical Engineering Theory 0.5 Construction Practical +0.5	1939	1940	2	Electronic Engineering Theory	Radar Station - Activated Radar Efficiency +5
Rare Materials Refining Techniques		5	Chemical Engineering 1.0	1936	1938	3	Chemical Engineering	Rare Materials Production +5%
Steel Production		5	Chemical Engineering 1.0	1936	1938	3	Chemical Engineering	Metal Production +5%
Supply Production		2	Mechanical Engineering Theory 1.0	1918	1932	2	Mechanical Engineering Theory	Supplies Production +5%
Supply Organisation		5	Land Combat Experience 1.0	1936	1938	2	Land Combat Experience	Supply Throughput +5%
Supply Transportation		5	Land Combat Experience 1.0	1936	1938	2	Land Combat Experience	Supply Transfer Cost -0.01

Note, Allow trigger on Decryption Machine and Encryption Machine is likely a bug

Note, Supply Transportation, Supply Organisation, and Civil Defence actually appear on the page for Theory technology in-game.