It was clear from the accounts of the historian pliny(23-79 a.d. )that the romans also possessed burning-glasses . 从历史学家普林尼（公元23-79年）的记述中清楚知道罗马人也有点火镜。
2.
Precision designed , threaded connections for pilots , flame control and peepsight locations are standard on all units 精密设计，引火器螺纹连接，火焰控制，观火镜位置都是标准的。
3.
It was clear from the accounts of the historian pliny ( 23 - 79 a . d . ) that the romans also possessed burning - glasses 从历史学家普林尼（公元23 - 79年）的记述中清楚知道罗马人也有点火镜。
