Chinese translation for "doubling of the track"

铺设第二线, 双线化

Similar Words：

"doubling of frequency" Chinese translation, "doubling of line" Chinese translation, "doubling of sheets" Chinese translation, "doubling of the bow" Chinese translation, "doubling of the image" Chinese translation, "doubling of volume" Chinese translation, "doubling on itself" Chinese translation, "doubling over test" Chinese translation, "doubling piece" Chinese translation, "doubling piece = tilting fillet" Chinese translation