电源包“拉”的轮椅前进，这既延长了椅子的寿命和提高其可操作性。
The power pack"pulls" the wheelchair forwards, which both extends the lifetime of the chair and improves its manoeuvrability.
加热不但能够提高料液的操作性，而且可以对其进行杀菌。
Such heating can not only improve the feed's handling characteristics, but also may pasteurize it.
加热不但能够提高料液的操作性，而且可以对其进行杀菌。
Such heating can not only improve the feed's handling characteristics, but also may pasteurize it.
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