Pipe lodgepole-steel tunnel support technique is a strong composite support system consisting of advance pipe lodgepole, support stell vault, tin plate packer and working surface plug-back.

管棚复合钢支撑技术，是一个通过超前管棚、支撑钢拱、白铁皮隔离、工作面封堵的相互配合和共同作用，形成了具有强大支护抗力的复合支护体系。

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"But that was too easy to plug back in," he says.

他也说到“但那简直太容易又插回去了”。

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“But that was too easy to plug back in,” he says.

他也说到“但那简直太容易又插回去了”。

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Even as I'm here today, Vice President Biden is in Delaware announcing the reopening of a once-shuttered GM factory that will soon put people back to work building plug-in, electric hybrid vehicles.

WHITEHOUSE: President Obama Explains the Smart Grid and Economic Recovery | The White House

If we get plug-in hybrid cars, you can plug it in at night and sell back electricity to the utility, and then charge up your car again in the morning before you leave.

WHITEHOUSE: Online Town Hall

The SMILE Plug includes a 5V Lithium-Ion polymer battery for back-up power, making it ideal for learning environments where electrical power can be inconsistent.

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