本文主要介绍我所最近研制成功的868型GPS授时接收机的情况，包括整机构成、主要性能以及试验结果。
In this paper, a model 868 GPS Timing re - ceiver is introduced mainly, including the compositions, performances and experimental results of this system.
介绍了南京玄武湖隧道结构混凝土的技术要求、配合比设计、主要性能以及温度和应变施工测试结果等研究技术的攻关。
The article introduces specification for structural concrete used in the tunnel as well as its mix design, main properties and temperature-strain results measured.
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