| twin computer system | Doppelsystem |
| twin conductor | Doppelader |
| twin conductors | Doppelader |
| twin contact | Doppelkontakt |
| twin Cornish boiler | Zwillingskessel |
| twin crystal | Zwillingskristall |
| twin cutter | zweiteiliger Fräser |
| twin daughters | Zwillingstöchter |
| twin delta loop | Doppel-Delta-Loop |
| twin diode | Doppeldiode |
| twin dipole | Doppeldipol |
| twin dipoles | Doppeldipole |
| Twin Dragons | Twin Dragons |
| twin drive | Doppellaufwerk |
| twin drives | Doppellaufwerke |
| Twin Earth thought experiment | Zwillingserde |
| twin embolization syndrome , TES | Verlorener-Zwilling-Syndrom |
| twin engine | Zweizylindermotor |
| twin engined | zweimotorig |
| Twin Falls | Twin Falls |
| twin filament lamp | Doppelfadenlampe |
| twin formation | Zwillingsbildung |
| twin fuselage | Doppelrumpf |
| twin girl | Zwillingsmädchen |
| twin girls | Zwillingsmädchen |
| twin headlamps | Doppelscheinwerfer |
| twin headlights | Doppelscheinwerfer |
| twin hoist | Zwillingszug |
| twin hose | Doppelschlauch |
| twin jack | Zwillingsklinke |
| Twin Jet Nebula | Schmetterlingsnebel |
| twin lamp indicator | Twin-Lamp |
| twin lead | Bandkabel |
| twin lens reflex camera | zweiäugige Spiegelreflexkamera |
| twin lock | Zwillingsschleuse |
| twin locks | Zwillingsschleusen |
| twin microphone | Twin-Mikrofon |
| Twin Mustang | Twin Mustang |
| twin needle | Doppelnadel |
| twin needle lockstitch cylinder arm machine | Zweinadel-Doppelsteppstich-Freiarmmaschine |
| twin needle lockstitch postbed machine | Zweinadel-Doppelsteppstich-Säulenmaschine |
| twin needle sewing machine | Zweinadel-Nähmaschine |
| twin needles | Doppelnadeln |
| Twin of Fire | Herz aus Feuer |
| Twin of Ice | Herz aus Eis |
