战国时代发明了可以双箭齐射的连弩，提高了发射速度。

Repeating crossbow which could launch two arrows at a time was invented during the Period of Warring States.

youdao

战国时代发明了可以双箭齐射的连弩，提高了发射速度。

Repeating crossbow which could launch two arrows at a time was invented during the Period of Warring States.

youdao