What does 小时级发射 refer to in 该型火箭具有“一箭多星”发射能力、小时级发射等多项优点? “快响利箭”海上飞天
长征十一号火箭是一枚四级固体运载火箭，全长约20.8米，最大箭体直径2米，总质量约58吨，主要用于发射近地轨道和太阳同步轨道有效载荷，该型火箭具有“一箭多星”发射能力、小时级发射等多项优点，被誉为我国长征系列运载火箭家族中的“快响利箭”。
海上飞天！一箭九星！我国首次海上商业化应用发射成功！，2020年09月15日

In the above I'm unsure what 小时级发射 refers to.  Some automatic translations are &quot;Hourly launch&quot; (Google Translate and Baidu) and &quot;Hour-stage launch&quot; (YouDao).  It seems &quot;hourly launch&quot; could not be correct---the rocket doesn't launch every hour.  My best guess is that it indicates that the rocket only takes hours to get its payload into orbit, but I'm unclear on this.
Question: What does 小时级发射 refer to in 该型火箭具有“一箭多星”发射能力、小时级发射等多项优点?
The whole passage means something like:

[My translation:] The Long March 11 rocket is a 4-stage solid carrier rocket, total length 20.8 meters, maximum diameter 2 meters, total mass around 58 tonnes, primary use is to launch payloads into near earth orbit and sun-synchronous orbit; this model rocket has &quot;one rocket multiple satellite&quot; launch capability, hour-grade launch etc. multi-faceted merits, and is acclaimed as the Long March rocket family's &quot;quick arrow&quot;.
It means quick-reaction launch.
How I came to this conclusion:

The article you linked has some sort of quote from the rocket designer 彭昆雅, whose paragraph of explanation concludes with 大幅缩短了发射链条，提高发射效率和效益。So the purpose of the rocket is to &quot;enormously reduce the launch chain and improve the launch efficiency and effectiveness&quot;. To improve the deployment time.

The Wikipedia page in Chinese about the Long March 11 states 长征十一号发射周期不超过72小时，最短发射时间在24小时以内

Switch to English, and after the first few sentences, which seem to echo your own translation, you see &quot;It was designed with the ability to launch on short notice [...]&quot;.

Check the source that Wikipedia has quoted, and you read &quot;The CZ-11 is developed [...] with the goal to provide a quick-reaction launch vehicle, which is easy to operate, cost-efficient to launch, can remain in storage for long period and reliably launch on short notice&quot;. There is consistency.

Another Wikipedia source, nasaspaceflight.com says &quot;It’s goal goal is to provide an easy to operate quick-reaction launch vehicle&quot;.

Finally Google for &quot;quick-reaction launch&quot; (quoted) and you'll find some additional references from non-Chinese websites about rocket capabilities.