- discount, price reduction
- door sill, sill
- damage, defect
- defective, faulty
- diagram, pattern
- dead, idle
- downtime, idle time
- dip, immerse
- dip-painting, immersion coating
- drier, oven
- drip, drop
- deceleration; delay
- dilute, thin
- deformation, distortion
- displacement; misalignment
- door lock (button)
- delivery, shipping, dispatch
- dispenser gun; gasoline pump
- dispensing outlet, dispensing station
- dismount, disassemble, dismantle, take apart
- destroy, ruin, wreck
- die cushion, cushion
- drawbar, drawbead
- draw punch, post
- distorsion; waviness
- deal with, cope with
- down shift, shift into a lower gear
- directly controlled system; plant
- disturbance variable, perturbance variable; disturbance
- disturbance variable feed-forward, perturbance variable feed-forward
- disturbance response, disturbance behaviour
- derivative action, rate action
- derivative time, rate time
- double control, with two reference magnitudes and two controlled magnitudes
- D-element, differential element
- differential regulator, D-controller
- dialing switch,option selector
- designation strip, marking strip; lettering strip; labeling strip
- dummy module, blank module; dummy unit
- duplicated, redundant
- disc (AM)
- drill-out, bore-out
- detachable, removable; releasable
- dummy cover, dummy plate
- distance ring, spacer ring
- drill press, electric drill
- drill hole,borehole; boring; bore; hole
- drill jig, drill gauge; drilling jig; drilling gauge
- diagonal cross brace, cross bracing
