doppelwandig (Tür) (adj)

double-skin ... (adj)

double-wall ... (adj)

double-walled (adj)

The facing screw channels allow the construction of double-walled frame elements.

The facing screw channels allow the construction of double-walled frame elements.

双壁 ...... (adj)

双壁的...... (adj)

双层 ...... (adj)

... de doble pared (adj)

... de doble piel (adj)

de doble pared (adj)