- supersonic velocity measurement
- 超声波速度测量
English-Chinese geology dictionary (英汉地质大词典). 2013.
English-Chinese geology dictionary (英汉地质大词典). 2013.
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Gerald Bull — Gerald Vincent Bull (March 9, 1928 March 22, 1990) was a Canadian engineer who developed long range artillery. He moved from project to project in his quest to economically launch a satellite using a huge artillery piece. To this end he designed… … Wikipedia