There, large numbers of fans of this type are used in applications requiring low noise, installation size limited, high pressure raised and low cost.

因此在要求高压力大风量低噪声且安装空间较小的使用场所得到广泛的使用。

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The basic of safety working for high pressure gas stations is scientific design and reasonable installation.

高压气站供气系统安全正常运行的基础是设计科学，安装合理。

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Due to the rapidly growing requirement for high-pressure heave-wall pipeline installation, mechanized GMAW process is a key technology for increase welding productivity.

由于高压厚壁油气长输管线建设的迫切需求，采用自动GMAW焊是提高管线建设生产率的关键。

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