发布会表示，级间环是多级火箭的关键组成部分，而用在中国现有火箭上的级间环以往都是分开制造，最后组装的。
The release said an interstage ring is a key component in a multistage rocket, and that those used on China's current rockets were made in sections before being assembled.
元器件间的连接是纳米级电子产品至关重要的部分。
The connections between components are a vital element of nanoscale electronics.
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