“长鸣警钟、确保成功、质量改进、永无止境”的红色横幅在三月春风中显得格外醒目，这又让航天人回忆起历史上的３月那个沉重的日子。在长二捆火箭发射澳大利亚卫星时，因一块０．１５毫米的铝质多余物造成整个发射终止，亿万电视观众在现场转播的画面前扼腕痛惜，这一天也让? The red banner, which has long been known as the alarm bell, ensured success, improved quality, and never-ending, is particularly striking in the spring breeze in March. This again reminds the astronauts of the heavy days of March in history. When the Changer II rocket launched the Australian satellite, the entire launch was terminated due to a piece of 0.15mm aluminum extra material. Hundreds of millions of TV viewers were sorely regretted before the live broadcast of the footage. What happened this day?