Vertically mounted engine driving main rotor via toothed belt as second-stage reduction gear .

垂直安装的引擎，该引擎作为第二阶段的减速齿轮齿形带主旋翼。

The damage cause of reduction gear of cooling tower fan is analyzed, some countermeasures are adopted.

分析凉水塔风机减速箱齿轮损坏的主要原因, 采取相应的防范措施.

Cylindrical gears reduction gear box lid's machine-finishing process engineering and milling port hole end surface's unit clamp design;

圆柱齿轮减速器箱盖的机械加工工艺过程设计及铣削观察孔端面的专用夹具设计；

The whole finite element model includes 5 nodes and 5 elements, and these element types are D. C. motor element, reduction gear element, beam element, crank element and buffer element.

有限元模型包括5个节点和5个单元，这些单元分别是直流电机单元、齿轮减速器单元、梁单元、曲柄单元和缓冲器单元。