由此说明，在主镜散热和空气流通方面，主镜遮光筒有较大弊端。
These results show that the primary baffle has major disadvantages in respect of mirror cooling and air circulation.
摘要：遮光筒会影响主镜上方的空气流动，不利于主镜表面与周围空气的热交换。
Abstract: primary baffle would influence the airflow above the primary mirror, which is not conducive to heat exchange between the mirror's surface and the ambient air.
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