将气垫船放置在水平桌面上。

Set the hovercraft on a level table.

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在水平桌面上放置一张纸并在纸上放置一个圆柱形物体。

Place a sheet of paper on a horizontal table and put a cylindrical object (e. g. a pencil) on the paper.

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仪器应置于水平工作台上，应将操作面板放在水平桌面上，不可悬空放置。

The device should be evenly placed on the horizontal platform, and place the operation panel on the horizontal desktop instead of suspending.

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