At the same time there are also significant improvements in design, speed and battery performance.
在同一时间，也有显着的改善，在设计，速度和电池性能。
The improvements in design, replacement and operation were suggested.
提出了今后在设计、更换、操作等方面的改进措施。
The improvements in design, replacement and operation were suggested.
提出了今后在设计、更换、操作等方面的改进措施。
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