The original design of valve plate to open the gas valve is hanging in the channel, the possession of an effective diameter about 20%.

而原设计阀板打开是悬于阀体的气体通道内，占有有效通径20%左右。

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If you smell gas or hear blowing or hissing noise, open a window and quickly leave the building.

如果你闻到煤气的味道或者听到泄漏的嘶嘶声，打开窗户，迅速离开这个建筑。

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And now we'll open it up V2 and just have the bigger volume, V2, and let the gas fill it.

现在我们打开它,有了更大的体积，然后让气体充满它。

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On reaching the shale, the mixture of water and fracking fluid bursts open the rock and the sand keeps the fractures open, allowing the gas to flow to the surface.

ECONOMIST: Fracking

Carbo Ceramics is a leader in making what's called ceramic proppant, which is the synthetic material, sand-based often, with chemicals that are injected into the fractured rock to hold open the cavities so the natural gas goes up into the piping that captures it.

FORBES: Intelligent Investing

The administration will develop a long-term plan for extreme weather to ensure power and heat is restored quickly, the gas stations stay open, hospitals maintain power and the city's transportation system keeps operating.

WSJ: Mayor Celebrates His Achievements