extr - firs
- extr
- extra
- extra band
- extra charge
- extra clearance
- extra current
- extra duty
- extra edition
- extra half plane
- extra high lifter
- extra holes
- extra issue
- extra key
- extra low-carbon ferrochrome
- extra train
- extra-deep qualities
- extra-heavy (crude )oil
- extra-heavy (crude )oil
- extra-heavy drill collar
- extra-high-voltage (transmission )line
- extra-high-voltage (transmission )line
- extra-high-voltage power transformer
- extra-high-voltage substation
- extra-high-voltage system
- extra-long-play tape
- extra-rapid-hardening cement
- extra-strong paper
- extra-terrestrial colony
- extra-terrestrial power plant
- extra-terrestrial radiation
- extra-terrestrial [space] industrialization
- extrachromosomal DNA
- extrachromosomal gene
- extrachromosomal [nonchromosomal] heredity
- extracode
- extracode instruction
- extract
- extract concentrate
- extract content
- extract system of ventilation
