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1·It is maintenance free and unnecessary to adjust or clean lens.

激光器无需进行任何维护，也不用调整或清洁镜片。

2·Rugged: Virtually indestructible and practically maintenance free.

坚固：几乎无法毁坏，不需维修。

3·Maintenance free operation, no need to add water, no equalizing charge required.

设计简洁，免维护，无需补水，不需均衡充电。

4·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。

5·It's durable and maintenance free with a coat of crisp, white powder coating over steel.

它的耐用和维修免费的和清晰的，对钢材的白色粉末涂料大衣。

6·Recent studies show that Japanese cars are still more maintenance free than American cars.

最近的研究显示，日本的车在免维修这一点上，仍超过美国车。

7·Car battery, Forklift battery, Golf cart battery, Maintenance free battery, Dry charged battery.

汽车电池、叉车电池、高尔夫电池、免维护电池、干荷电池。

8·Hospital, government building, plaza and other lighting places: long life span and maintenance free.

医院、市政大楼、广场等照明场所：长寿命、免维护。

9·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。

10·HYDAC back-flush filters are designed for continuous and maintenance free filtration in all sectors of industry for water filtration.

HYDAC后台刷新过滤器是设计用于连续和维护水过滤所有的行业免费过滤。