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preliminary design
IT	προκαταρκτικός σχεδιασμός
transp.	προκαταρκτική μελέτη; προμελέτη f; προσχέδιο n
English thesaurus
preliminary design
energ.ind., abbr.	p.d.
Preliminary Design
abbr., astronaut., mil.	PD

preliminary design : 3 phrases in 2 subjects

Construction	1
Information technology	2