A、as the basis for star charts
B、to enter a star finder
C、in sight reduction using Pub 249
D、in sight reductions of planet observatio
A、as the basis for star charts
B、to enter a star finder
C、in sight reduction using Pub 249
D、in sight reductions of planet observatio
时间:2022-01-03 08:22 关键词: 天文航海
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