Clearance between tubes to be soldered should be from .001” to .006”. It is not practical to actually measure this; however, you do not want a dry fit to be loose.
Definition: Dry fit
Assembling the pieces of a project to check their fit before gluing. Can also refer to the assembled pieces.
http://themodelroom.250free.com/GLOSSARY.HTM
Dry Fit: The "test fitting" of model pieces by physically holding or taping them together without glue to ensure the fit is correct. As a perfect fit between model pieces will not always happen, this method is used to check how much filing and putty work will be required to eliminate seams; to see how much excess plastic from the molding process has to be cut away; or if additional styrene is needed to ensure a correct fit.
Per questo penso che si potrebbe azzardare qualcosa come "accoppiamento a secco" (o accoppiamento prima di saldare/di effettuare la saldatura).
Definition: Dry fit
Assembling the pieces of a project to check their fit before gluing. Can also refer to the assembled pieces.
http://themodelroom.250free.com/GLOSSARY.HTM
Dry Fit: The "test fitting" of model pieces by physically holding or taping them together without glue to ensure the fit is correct. As a perfect fit between model pieces will not always happen, this method is used to check how much filing and putty work will be required to eliminate seams; to see how much excess plastic from the molding process has to be cut away; or if additional styrene is needed to ensure a correct fit.
Per questo penso che si potrebbe azzardare qualcosa come "accoppiamento a secco" (o accoppiamento prima di saldare/di effettuare la saldatura).
Consuelo Marchioni Italien Arbeitsgebiet Muttersprache: Italienisch PRO-Punkte in Kategorie: 2
The translation workplace 
Zustimmung (Netto): +3