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12

The default grid system provided in Bootstrap utilizes 12 columns that render out at widths of 724px, 940px (default without responsive CSS included), and 1170px. Below 767px viewports, the columns become fluid and stack vertically.

<div class="row">
    <div class="span4">...</div>
    <div class="span8">...</div>
</div>

As shown here, a basic layout can be created with two "columns", each spanning a number of the 12 foundational columns we defined as part of our grid system.


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3 offset 3
8 offset 4
<div class="row">
    <div class="span4">...</div>
    <div class="span4 offset4">...</div>
</div>

威格仪器-磁滞测功机输出轴抱死的原因及解决方案

With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new .row and set of .span* columns within an existing .span* column.

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p>Nested rows should include a set of columns that add up to the number of columns of it's parent. For example, two nested .span3 columns should be placed within a .span6.

Level 1 of column
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Level 2
<div class="row">
     <div class="span6">
        Level 1 column
        <div class="row">
            <div class="span3">Level 2</div>
            <div class="span3">Level 2</div>
        </div>
    </div>
</div>

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阻燃电缆的分类及代号

The fluid grid system uses percents for column widths instead of fixed pixels. It also has the same responsive variations as our fixed grid system, ensuring proper proportions for key screen resolutions and devices.

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<div class="row-fluid">
    <div class="span4">...</div>
    <div class="span8">...</div>
</div>

球阀软密封和硬密封的使用上的区别

Nesting with fluid grids is a bit different: the number of nested columns doesn't need to match the parent. Instead, your columns are reset at each level because each row takes up 100% of the parent column.

Fluid 12
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Fluid 6
<div class="row-fluid">
    <div class="span12">
        Level 1 of column
        <div class="row-fluid">
            <div class="span6">Level 2</div>
            <div class="span6">Level 2</div>
        </div>
    </div>
</div>

2016-11-17 金强电气欢迎您

The default and simple 940px-wide, centered layout for just about any website or page provided by a single <div class="container">.

<body>
    <div class="container">
        ...
    </div>
</body>

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<div class="container-fluid"> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.

<div class="container-fluid">
    <div class="row-fluid">
        <div class="span2">
            <!--Sidebar content-->
        </div>
        <div class="span10">
            <!--Body content-->
        </div>
    </div>
</div>

FRSHSG型(单通道 ,高速)

Media queries allow for custom CSS based on a number of conditions—ratios, widths, display type, etc—but usually focuses around min-width and max-width.

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LabelLayout widthColumn widthGutter width
Smartphones480px and belowFluid columns, no fixed widths
Smartphones to tablets767px and belowFluid columns, no fixed widths
Portrait tablets768px and above42px20px
Default980px and up60px20px
Large display1200px and up70px30px

电磁屏蔽原理是什么?

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<meta name="viewport" content="width=device-width, initial-scale=1.0">

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Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:

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Why not just include it? Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.

  /* Landscape phones and down */
  @media (max-width: 480px) { ... }

  /* Landscape phone to portrait tablet */
  @media (max-width: 767px) { ... }

  /* Portrait tablet to landscape and desktop */
  @media (min-width: 768px) and (max-width: 979px) { ... }

  /* Large desktop */
  @media (min-width: 1200px) { ... }

电磁屏蔽室运行整体结构和电磁屏蔽室运行原理

What are they

For faster mobile-friendly development, use these basic utility classes for showing and hiding content by device.

When to use

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ClassPhones 480px and belowTablets 767px and belowDesktops 768px and above
.visible-phoneVisible
.visible-tabletVisible
.visible-desktopVisible
.hidden-phoneVisibleVisible
.hidden-tabletVisibleVisible
.hidden-desktopVisibleVisible