摘要
What is a launch pad?什么是发射台?A launch pad is an above-ground facility from which a rocket-powered missile or space vehicle is vertically launched.发射台是用于垂直发射火箭或航天飞船的地面设施。Why is the launch pad needed?为什么需要发射台?
出处
《问天少年》
2022年第6期82-83,共2页
Aerospace Knowledge Youth