Agriculture	43
Automated equipment	1
Automobiles	5
Aviation	1
Ceramics	1
Chemistry	17
Coal	15
Communications	4
Computer numerical control	4
Construction	24
Drilling	2
Earth sciences	38
Economics	3
Education	2
Electronics	14
Energy industry	11
Environment	18
Forestry	12
General	10
Hobbies and pastimes	1
Hydraulics	1
Hydrology	3
Industry	13
Information technology	12
International Monetary Fund	2
Life sciences	14
Loading equipment	18
Materials science	4
Measuring instruments	5
Mechanic engineering	139
Mechanics	1
Metallurgy	10
Meteorology	5
Mexican	10
Mineral products	1
Name of organization	2
Natural sciences	5
Nautical	1
Packaging	3
Patents	2
Pest control	7
Physical sciences	5
Politics	2
Spanish	5
Technology	60
Textile industry	3
Transport	53
Water resources	5
Work flow	2


selector
gen.	seleccionador; dispositivo selector
agric.	separador de granos
earth.sc. tech.	selector
el.	interruptor selector; barra de selección vertical; conmutador; conmutador selector
tech.	selector del cambio de velocidades
transp.	palanca de cambio