Because of good performance and space saving, gearless permanent magnet synchronous traction machine is more and more widely used to drive the elevator.
由于无齿轮永磁同步曳引机具有性能优越、占用空间小的特点，在电梯驱动系统中的应用日趋广泛。
Hard drive: Dont scrimp on storage space, unless you are absolutely certain you wont be saving many photos, songs or videos.
让我们再看看硬盘：别对存储空间那么吝啬，除非你很确定不会存许多照片、歌曲或是视频图像。
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