无所不知
发表于 2025-3-23 10:26:16
ls through the air. The signals are usually transmitted on high frequency carriers. For example, a t- ical voice signal requires only 30 Kilohertz bandwidth. When it is transmitted by a FM radio station, it is often carried by a frequency in the range of tens of megahertz to hundreds of megahertz. Usually a ra978-1-4419-3663-9978-0-387-23802-9
抓住他投降
发表于 2025-3-23 15:32:10
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与野兽博斗者
发表于 2025-3-23 18:46:59
Book 2007idered and may, with a restoration of funding, come to fruition. Soviet studies of deep space and Mars missions (e.g. TMK, Aelita) have much to offer contemporary planners in Europe and the United States. Long-duration ISS and Mir missions provide a medical record of considerable value in constructi
轻信
发表于 2025-3-24 00:11:20
978-0-387-46343-8Springer-Verlag New York 2007
IDEAS
发表于 2025-3-24 03:13:09
Springer Praxis Bookshttp://image.papertrans.cn/r/image/832303.jpg
烤架
发表于 2025-3-24 07:14:42
https://doi.org/10.1007/978-0-387-49664-1ISS; Mir; USSR; development; engineering; flight paths; landing techniques; paper; planet; space exploration;
B-cell
发表于 2025-3-24 11:55:24
First landfall on Venus, Mars,nce again, measures were taken to strengthen the descent cabin for the two probes to be launched. Whatever the purpose of the Venera 5 and 6 missions, this new set was intended from the start to reach the surface intact, even if that meant it was overbuilt and that hardly any scientific instruments could be carried.
chronicle
发表于 2025-3-24 16:33:08
Returning to the planets?, though, left Gleb Maksimov and Konstantin Feoktistov in OKB-1 making plans for a manned flight to Mars with their TMK-1 and TMK-2 designs, respectively. What happened to them? What other Soviet projects were advanced for the manned and unmanned exploration of the planets?
罐里有戒指
发表于 2025-3-24 20:57:29
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Ossification
发表于 2025-3-24 23:27:15
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