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  • 刘长明, 张冰, +5 authors 黄粉
  • Computer Science
  • 2011 (First Published: 7 January 2011)
  • The invention discloses a method for realizing multiple access with a random number statement, which mainly solves the problems of low channel utilization rate and long channel access delay caused byContinue Reading
  • 胡广
  • Physics
  • 2012 (First Published: 24 December 2012)
  • The invention relates to an electric impacting tool. The electric impacting tool comprises a machine body provided with a drive shaft, a first air cylinder system, an impacting system connected withContinue Reading
    本刊讯国家安全生产监督管理局于7月15日至16日在河北召开全国安全生产工作座谈会。会上,国家局副局长孙华山首先传达中央领导同志关于安全生产工作指示和国务院安委会第二次全体会议精神。国家安全生产监督管理局局长王显政作了重要讲话。王显政把今年上半年全国安全生产工作概括为有创新、有特点、