The basic unit of user experience on the Web is, of course, the page, which we represent as a simple rectangle.
网络中用户交互的最基本单元是页面，因此我们采用一个矩形符号来表示页面。
Gough tubular conveyors have no moving parts... only contra-rotating motors. The simple design makes this unit environmentally safe and user friendly.
这款管式输送机无活动件，只有倒转马达。简单的设计使其非常安全，方便用户。
Gough tubular conveyors have no moving parts... only contra-rotating motors. The simple design makes this unit environmentally safe and user friendly.
这款管式输送机无活动件，只有倒转马达。简单的设计使其非常安全，方便用户。
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