主要观察3种手术的指标率，主要并发症，术后死亡率和资源利用。
Main Outcome Measures Rates of the 3 types of surgery, major complications, postoperative mortality, and resource use.
利用鉴频原理设计了一种无线多功能多路远程影像播控系统，介绍了采用的主要技术措施及实现的主要技术指标。
In this paper a distant image play-out system designed with the principle of frequency discrimination, main technical measures and main technical specifications are described.
利用鉴频原理设计了一种无线多功能多路远程影像播控系统，介绍了采用的主要技术措施及实现的主要技术指标。
In this paper a distant image play-out system designed with the principle of frequency discrimination, main technical measures and main technical specifications are described.
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