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Johnson Zheng
Melbourne, State of Victoria, Australia
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1 Year as a User
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Last challenge activity
International Rocket Engineering Competition 2025
Join us as we host thousands of the world's most ambitious collegiate rocketeer…
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June 8, 2025, 8:42 a.m. PDT
International Rocket Engineering Competition 2025
replied a new topic to
Clarification on Flight Safety Reviews
June 4, 2025, 10:39 a.m. PDT
International Rocket Engineering Competition 2025
created a new topic to
Clarification on Flight Safety Reviews
June 2, 2025, 5:24 p.m. PDT
International Rocket Engineering Competition 2025
created a new topic to
Da Vinci Frequency Allocation
1 Year as a User
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