https://www.washingtonpost.com/news/checkpoint/wp/2016/04/03/u-s-special-operations-units-are-using-faulty-rifle-sights/?hpid=hp_rhp-top-table-main_checkpoint-riflesight650p%3Ahomepage%2Fstory
• 问题似乎也不算很大。见在极端温度下误差图 -Chiyankun- ♂ (436 bytes) () 04/04/2016 postreply 07:25:40