由于其基建、吊装和并网所需的固定成本居高不下，因此促使人们设计和安装叶片长度超过60米的多兆瓦发电机。

The high fixed costs of foundations, erection and connection trigger the design and installation of multi megawatt turbines with blade lengths beyond 60 m.

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推进器的叶片已经安装好了。

The propeller blade has been mounted.

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这种类型的叶片安装在一个重量轻的木制大镰刀刀柄上。

This type of blade is fitted to a light weight wooden snath.

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