variable-displacement

: 45 phrases in 16 subjects

Automobiles	10
Aviation	3
Chemistry	1
Construction	1
Drilling	1
Earth sciences	1
Electronics	4
Hydroelectric power stations	2
Mechanic engineering	3
Metallurgy	1
Oil / petroleum	1
Rail transport	1
Refrigeration	2
Space	1
Technology	12
Textile industry	1