担任卫星总装工作的郑德兴、缪世强和李树嵩三位同志,在东方红三号卫星发射进入倒计时前5小时,因误吸氮气而中毒倒地。1994年11月29日22时左右,在西昌卫星发射中心15m高的发射塔七层平台上,试验队员准备进入火箭第三级腹部内舱排除故障,更换仪器。按操作规程,进舱前应戴上面部氧气罩,并作试戴性的深吸气。当试吸气两至三口时,他们凭经验感受不对, As the satellite assembly work Zheng Dexing, Miu Shiqiang and Li Shusong three comrades, in the Dongfanghong 3 satellite into the countdown before the 5 hours countdown, due to mishandling nitrogen poisoning fell to the ground. At about 22 o’clock on November 29, 1994, on the seven-layer platform of a launch tower with a height of 15m in Xichang Satellite Launch Center, the trial team members were prepared to enter the rocket’s third-level abdominal internal capsule to eliminate the malfunction and replace the instrument. According to operating procedures, before entering the cabin should wear oxygen mask, and try to wear a deep inspiration. When trying to breathe two or three, they experience the wrong experience,