He heated the metal and drew it out into a longwire.
他把金属烧热，并将它拉成一条长线。
《新英汉大辞典》
2
They produced a long metal wire four elements - the smallest of the superconductor are currently reported.
他们制作了四个分子长的金属线——目前有报道最小的超导体。
3
It's indispensable to use the longwire source to overcome the interference of the natural source in most of the electromagnetic methods of exploration geophysics.