Druckrphmep 



62 



Durchflutung 



ball pressure test, Brinell ball 

 impression or indentation t. 

 -rahmen film trap (projection 

 work), -raster printer's screen. 

 -regier pressure regulator, baro- 

 stat, piezostat. -rolle presser 

 or pad roll (film feed), -schiene 

 pressure shoes (film proj.). 

 -steg pressure or harmonic bar 

 (piano). -Verbreiterung pres- 

 sure broadening (re: gas spectrum). 

 -Verschiebung pressure shift (re: 

 spectral lines), -wage piston 

 manometer. -Windkessel com- 

 pressed airtank, blast pressure 

 tank. -Zug-Verstärker push-pull 

 amplifier, -ziinder pressure 

 igniter. 



D-Spannung Dee voltage (cyclotron). 



Duanten duants (cyclotron), dees. 



dubbein, dubben duplicate. 



Dublette doublet. 



Dubletten-Aufspaltung doublet 

 separation (spectrum). 



duff dead, dull. 



Dulling dulling (suppression of Af 

 by dubbing or scoring, m»p.). 



dumpf all bottom, tubby, boomy; dull 



dunkel, Modulierung auf modulation 

 to dark condition. 



Dunkel-adaptation, -anpassung dark 

 adaptation, scotopia. -entladung 

 dark discharge, dark current. 

 -fel dbeleuchtung dark ground il- 

 lumination. -Kan,iner dark room, 

 camera obscura. -methode ob- 

 servation in darkness, -pause 

 dark period, cut-off or obscur- 

 ing period (m.p.). -raum, 

 Aston' scher Aston dark space, 

 primary d.s. -raum, Faraday' scher 

 Faraday dark space. -,Kathodefi- 

 Crookes dark space, cathode d.s. 

 -stosse background counts (in 

 Geiger-ivlüller tube). -Strahlung 

 obscure radiation, heat r. (from 

 a light source), invisible (ac- 

 tinic)r. beyond the violet. 

 -Strom dark current (of photo- 

 electric cell flowing in absence 



of illumination), -wertsteuerung 

 adjustment to value of darkness. 

 -widerstand dark resistance. 

 -zeit dark interval or period. 



dunKles Stimtr.ungsbi 1 d low-key pic- 

 ture. 



dünn thin, tenuous, slender, dilute, 

 feeble, rare, weak. 



dünnwandig thin-walled. 



Dunst, Fernen- distant fog, 



Dunst-abzug hood (for fumes). 

 -abzugsrohr vent pipe, -kreis 

 atmosphere, -messer atmometer. 

 -rohr ventilating pipe. 



Dup-emulsion dupe emulsion. 

 -negativ duplicating negative. 

 -positivf i Irn duplicating positive 

 stock, master p. 



Dur (Tonart) major (musical pitch 

 or mode). 



durchbelichten fully expose or ir- 

 radiate. 



Durchbiegung deflection, flexure, 

 bending, coflexure, sag, dip (of 

 lire wire). 



Durchbl icKvorr ichtung dioptric de- 

 vice. 



durchbohren perforate, bore, drill, 

 punch, pierce, penetrate. 



durchbohrt perforated, punctured, 

 punched, bored, apertured. 



durchbrochen apertured, perforated. 



Durchbruch burst (discharge); frac- 

 ture, break, -stoss burst pulse. 



durchdringen pervade, permeate, 

 penetrate. 



durchdringend (inter) penetrating 

 (e.g., two crystal lattices), 

 penetrant. 



Durchdringungs-frequenz penetration 

 frequency, critical f. -vermögen 

 penetrating power, penetrativeness. 



Durcheinander confusion, mixup, bed- 

 lajD. 



durchfallen fall or drop through (a 

 potential). 



durchfallendes Licht transmitted 

 light, transcident 1. 



Durch-f 1 ussmesser flow meter. 

 -flutung circulation (magnetic 



