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   Polish
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to phrases
próżniowy adj.
construct. creux; évidé
próżniowy
: 99 phrases in 18 subjects
Analytical chemistry2
Cement1
Chemistry25
Construction38
Economy1
Electric machinery1
Electric traction3
General1
Isolation1
Lighting other than cinema1
Natural sciences3
Oil / petroleum1
Physical sciences8
Radiology1
Superconductivity2
Thermal Energy8
Vacuum tubes1
Video recording1