可以从标尺“拖出”这些线，作为在工作区上放置组件时的垂直或水平参考线。
These can be "dragged out" of rulers, providing a vertical or horizontal line to reference as you place components on the workspace.
用顶边下来450px处画一条水平参考线，我们将要用它给顶部添加阴影作为参考。
Draw a horizontal guide around 450px from the top border, we will use it as a reference guide to add a shade on top of the page.
“水平居中”可在边距参考线中心垂直对齐每个对象的中心。
Align center to line up the center of each object vertically in the center of the margin guides.
客观、全面地阐述和分析了目前我国新型干法水泥生产线普遍存在的设备漏油问题及原因，并提出了使用润滑脂的解决办法，对新型干法水泥企业提高现场设备管理水平具有较高的参考价值。
The paper objectively and fully expounds and analyses the oil leak problems and causes of the equipment on the new dry cement production line, and raised a solution by using grease.
客观、全面地阐述和分析了目前我国新型干法水泥生产线普遍存在的设备漏油问题及原因，并提出了使用润滑脂的解决办法，对新型干法水泥企业提高现场设备管理水平具有较高的参考价值。
The paper objectively and fully expounds and analyses the oil leak problems and causes of the equipment on the new dry cement production line, and raised a solution by using grease.
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