Subject
Abrasives industry
1
Aerospace industries
2
Agricultural chemicals industry
1
Agricultural machinery
1
Aircraft industry
2
Asbestos industry
2
Automobile supplies industry
1
Baked products industry
2
Bakeries
2
Battery industry
2
Beverage industry
1
Bituminous materials industry
1
Bookbinding
1
Bookbinding industry
1
Buildings, Prefabricated
2
Canned foods industry
1
Cement industries
1
Cereal products
1
Cereal products industry
1
Chemical industry
5
Chemical preservatives
1
Children's clothing industry
1
Clock and watch making
2
Clothing trade
6
Commercial art
1
Concrete
1
Concrete products industry
1
Construction industry
1
Cutlery
1
Dairy processing
1
Dairy products
2
Defense industries
1
Electric apparatus and appliances
2
Electric generator industry
2
Electric lighting Equipment and supplies
1
Electric machinery industry
1
Electric motor industry
2
Electric relays
1
Electronic apparatus and appliances
1
Electronic industries
1
Engines
1
Floor coverings industry
1
Food industry and trade
3
Food preservatives
1
Forest products industry
2
Foundries
2
Fruit
1
Furniture industry and trade
1
Glass manufacture
1
Grain Milling
2
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