拉伸强度呈下降趋势，而拉伸断裂伸长率以及冲击韧性则呈先增大后减小的变化趋势，弯曲性能对温湿度交变的环境不敏感。
Tensile strength decreased, while the tensile break extension percentage increased first and then decreased, flexural properties was not sensible to the changing humiture.
本文主要研究波浪交变载荷对挖泥船定位桩疲劳强度的影响。
This paper mainly study the influence of wave alternating load on the strength of cutter suction dredger spud.
针对电机的实际工作环境，研究了不同工作状态的磁体在交变磁场作用下表面磁感应强度随时间的变化。
The operating conditions in a permanent magnet were analyzed to quantity the magnetic induction changes on the surface with an alternating magnetic field.
针对电机的实际工作环境，研究了不同工作状态的磁体在交变磁场作用下表面磁感应强度随时间的变化。
The operating conditions in a permanent magnet were analyzed to quantity the magnetic induction changes on the surface with an alternating magnetic field.
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