They have low friction and can be produced with high precision and in quiet running variants.

它们摩擦力低，可以制造出精确度高，满足安静运行要求的各种类型。

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Therefore our oil-lubricated vacuum pumps are especially quiet running and almost vibration-free.

因此，我们的油润真空泵运行时特别安静，几乎无振动。

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With easy operation, quiet running and economic electricity-using, the machine is suitable for the following places, such as park, cinema, station, store and living community.

康凌牌热狗机操作简单，运转安静，节省电能，适用于公园、电影院、车站、商场，居民区等地方摆设销售。

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AMD's VP of Consumer Business, Joe Menard, said that these living room PCs "may come out next year" and might even include quiet running, fanless designs if we read into his comments just a bit.

ENGADGET: AMD unveils living room PC reference design: world squints in wonder

However, separate research by the institute, which was consistent with results from similar studies by the National Highway Traffic Safety Administration (NHTSA), showed increased risks for pedestrians from quiet hybrids running on electricity at low speeds.

FORBES: Hybrids: Two New Reports Reveal Good and Bad News

It offers up to 50 miles of all-electric driving, and then another 250 miles with the (very quiet) gas motor running.

FORBES: Electric Cars Most Likely To Succeed In 2011