We install gas piping and tubings, perform alterations, cylinder changes, and maintenance.

也进行气体管道铺设的工程、改造工程、容器装设工作和管理。

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The compositions of high efficient epoxy adhesive and its application in repairing of gas piping were introduced in this article.

介绍了高效环氧胶粘剂的配制及其在煤气管道修补中的应用效果。

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Analyzes the coal gas piping to leak of reasons, introduces the coal gas piping to leak of first-aid repair the methods and regulation.

分析了煤气管道泄漏的原因，介绍了煤气管道泄漏的抢修方法和注意事项。

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The EPA mentions the cost to bring coal-fired plants into compliance, but does not mention the much more expensive cost of piping natural gas to a refinery.

FORBES: Cheap Natural Gas Will Kill More Coal Plants Than Us: EPA

Rather than eliminate nitrogen oxide via a bulky chemical treatment system that even the EPA questioned initially, EGR would make the motor do all the work by piping exhaust gas back into the cylinders and burning it again a cleaner, cheaper, lower-maintenance solution, which would set Navistar ahead of the pack.

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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.

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