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Current X-ray lasers require facilities that are kilometres long. A cavity-based set-up about 66 metres in length has been developed that uses highly reflective mirrors to enable the generation of high-intensity pulses of narrow-band X-ray radiation. This promises to overcome the limitations of current X-ray lasers.
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2026-02-28 13:00:00，详情可参考im钱包官方下载
desk calculator) or "data entry" (alphabetic) keyboard. A bank would put one of