双速附加传动 two speed accessory drive ; TSAD
双速齿轮传动装置 two speed gear
双级减速齿轮传动装置 double reduction gear device
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分析研究了双速多用绞车传动系统，建立了优化模型，并提出了一套切实可行的优化算法。
This paper analyzed the two-speed universal winch's transfer system, then established optimization model, and posed a practical optimization algorithm.
这种结构的双速开关结构简单、传动效果好。
The double speed switch has the advantages of simple structure and good transmission effect.
首先，根据汽车动力传动系统的扭振当量原则与方法，分别建立了怠速工况与正常行驶工况下发动机、双质量飞轮以及传动系统的无阻尼多自由度扭振当量模型。
First of all, the two undamped multi-freedom torsional vibration models of DMF under idling and driving condition are built based on the principles of vehicle power train equivalent torsional model.
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