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Put the pack on a smooth surface, at waist height.
把包装放在一个光滑的表面，在腰部高度。
youdao
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Hoister running smooth, it can be upgraded to reach a higher height.
提升机运行平稳，因此可达到较高的提升高度。
youdao
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Hoister running smooth, it can be upgraded to reach a higher height.
提升机运行平稳，因此可达到较高的提升高度。
youdao