针对外环流活塞泵运转时出现的汽蚀、震动问题，从理论上分析了转子型线与闭死容积、流速变化和发生汽蚀的内在关系；
To the problem of cavitation and shock that appears in the outside circulation piston pump running, the relation-ship between rotor profile and dead volume, flow rate and cavitation were analyzed.
深井充填管道输送由于充填倍线小，料浆流速大对管道形成了很大的冲击磨损。
High slurry flow rate had big impact abrasion on pipeline due to small filling times line of filling pipeline transportation system in deep well.
通过严格的理论推导，论证了自适应电流速断保护不仅适用于单回线运行方式，同样适用于双回线或环网运行方式。
Strict theoretical deduction shows that adaptive current fast - tripping protection can be used not only on single - circuit line, but also on double - circuit line.
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