渣、铁沟流嘴的合适位置可用本文提出的理论计算方法并结合实践经验确定。
The suitable position of iron and slag runner's nose can be determinated by the theoretical calculation method presented in this paper and according to actual experience in design practice.
本文结合实践经验从理论上分析了真空断路器机械参数的选择原则及经验数据。
This paper analyzes selection principle of mechanical parameters of a vacuum breaker and empirical data in theory combined practical experience.
根据图谱法设计螺旋桨的方法原理，结合实践经验，开发了渔船螺旋桨设计软件系统。
According to the principle of propeller design by atlas method and combined with practical knowledge the software system for the propeller design of fishing vessels is developed.
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