Since 1974, when Henry J. Heimlich, a thoracic surgeon, introduced his abdominal-thrust technique, an estimated 100, 000 people have been rescued from choking.
自从1974年，胸外腔科医师亨利·j·海姆利·希提出腹部猛推手法，大约有十万人从窒息中活了过来。
Introduced the optimized parameter of the multi screw and the design technique progress of thrust bearing system.
并对多螺杆的参数优化以及推力轴承系统的设计技术进展进行了介绍。
It is a new experience to apply magnetic levitation technique to thrust measurement for rocket engine.
将电磁悬浮技术用于火箭发动机推力测试试验台是一次新的尝试。
It is a new experience to apply magnetic levitation technique to thrust measurement for rocket engine.
将电磁悬浮技术用于火箭发动机推力测试试验台是一次新的尝试。
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