铸造起重机(特别是采用行星减速机者)在卷筒端低速轴上安装安全制动器，对起升机构起到有效的安全保护作用。

Safety brakes have been used at low speed shaft of ladle cranes, especially of those with planet gear boxes. Safety brakes protect the main hoist effectively.

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本发明大体上涉及风力涡轮机。具体地，本发明涉及小型、低速、水平轴风力涡轮机。

The present invention relates generally to wind turbines. In particular, the invention concerns small, low speed, horizontal axis wind turbines.

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卧式倒伞型表面曝气机为垂直轴低速曝气机，可广泛用于城市污水和各种工业废水的生化处理。

The Horizontal Type Invert Umbrella Surface Aerator is a vertical-shaft and low-speed aerator. It can be used in the biochemical treatment of municipal sewage and industrial wastewater.

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