Before revision: Other similar types In addition to Twin-lead, parallel wire line comes in two additional forms Window line 220px|alt=Nominal 450Ω window line|Nominal 450 ohm "window line".
After revision: two-conductorOther similar types In addition to Twin-lead, parallel wire line comes in two additional forms Window line 220px|alt=Nominal 450Ω window line|Nominal 450 ohm "window line".