Brushless Motor, imported bearing from Europe, smooth running and maintenance free.

无刷电机驱动，欧洲进口轴承，运行平稳，免维护。

youdao

The major advantage of the columns is the absence of moving parts hence they are nearly maintenance free.

浮选柱的最大优点是它没有移动部分，因此可以保持几乎不动。

youdao

The flywheel energy storage unit, which replaces the conventional chemical battery, is maintenance free, has long life and emits no pollution.

飞轮储能单元代替传统的化学电池，具有免维护、寿命长、无污染的特点。

youdao

With a top speed of 14 mph it was anything but fast, but it was virtually maintenance free.

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Highly effective, and completely maintenance free, it kept their pueblos warm in winter, and cool in the summer using only stone age technology.

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His maintenance-free bike uses a "secret" mix of organic materials to make it waterproof and fireproof, and is then lacquered to give it a friendlier appearance.

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