求翻译：三天后的12月19日，“1121包头空难”中17位罹难者家属，据此向全国人大常委会提出了全国人大完善备案审查工作程序之后的首份审查建议书——是什么意思？

Three days later, on December 19, 1121 Baotou air crash in 17 families of the victims, pursuant to the National People's Congress Standing Committee of the National People's Congress to improve the filing and examination procedures after the first review of the proposal -

The 3 days later on 19 December 1121, the "crash" header in 17 bit of the families of the victims, according to the National People's Congress Standing Committee of the NPC perfected by filing review process after the first of a series Proposal Review -

Three day after on December 19, “1121 Baotou air disasters” 17 person who perish family members, according to the above proposed after Standing Committee of the National People's Congress National People's Congress consummates sets up a file the examination working routine first examination letter o

Three days later on December 19, "1121 baotou air crash" 17 family members of the victims, perfect accordingly submitted to the national people's Congress Standing Committee of the national people's Congress for the record review procedures after the first review submission –

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