The engine hydraulic stepless speed regulation cooling fan changed the traditional drive type of the engine cooling fan.

发动机液压无级调速冷却风扇，改变了发动机冷却风扇的传统驱动方式。

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Its major structural design composes the calculation of various parts' energy loss, the design of fan, type selection of engine, verification of structure and energy, and so forth.

结构设计主要内容包括各部分能量损失的计算、风扇的设计和动力机的选型、结构和能量的校核等。

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As for the other incidents that have beset the type over the past few months -- a fan shaft failure on an engine, an oil leak, a windshield crack -- all can safely be put down to teething problems.

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