| • secondary focal length | |
| द्वि: double acting double helical gear double | |
| द्वि तीयक: secondary secondary growth | |
| फोकस: focus | |
| फोकस दूरी: focal length focalization | |
| दूरी: distance travel run remove range length field | |
द्वि तीयक फोकस दूरी अंग्रेज़ी में
[ dvi tiyak phokas duri ]
