为改善地面操作起重机的起动、点动运行性能，可选用绕线型电动机加外延时继电器控制。
Slip-ring motor can be used in conjunction with time delay relays for floor operated cranes to improve their travelling quality during start and inching.
凌动需要很少的电量就可以运行，不需要庞大的电池来带动，于是，它们就在世界上意想不到的方面突然出现。
Since Atoms also use little powerand don't require bulky batteries to run, they're popping up in unexpectedparts of the world.
评论家说这种技术包含了太多的动部件，使得他的运行和维护很复杂。
Critics of the technology say it involves too many moving parts, making it more complex and expensive to operate and maintain than competing technologies.
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