菲涅尔镜片又称螺纹透镜，镜面上刻录了大小不一的螺纹。上一代主流会采用菲涅尔镜片因为这样透镜更薄更轻，厚度很薄，通常只有几毫米，重量也大大减轻。使用螺纹镜片会有一定的牺牲，因为螺纹会影响曲率和光线聚焦。 [4] Mr McNally Also referred this Court into a number of similar situations as well as sentences imposed in these instances and proposed that expenditure of Many others Similarly appropr... https://coingenius.news/copyright-analyst-kevin-svenson-foresees-bitcoin-skyrocketing-to-70000/