Hydraulic fluid power -pressure reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.

液压传动。减压阀、顺序阀、卸荷阀、节流阀和止回阀。安装面。

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Hydraulic fluid power - Pressure reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.

液压传动。减压阀、顺序阀、卸荷阀、节流阀和止回阀。安装面。

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Hydraulic fluid power - Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.

液压传动。减压阀、顺序阀、卸荷阀、节流阀和止回阀。装配面。

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Hydraulic fluid power - Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.

液压传动。减压阀、顺序阀、卸载阀、节流阀和止回阀。装配面。

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Vapor-liquid heat exchangers are often used to superheat the suction vapor of compressor and to subcool the inlet liquid of throttle valves in refrigerating system.

制冷循环中往往采用回热器，使压缩机吸气过热和膨胀阀入口液体过冷。

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Cause analysis of the water cooled wall tube burst focused on irrational points of design, excessive thermal loading, changes of coal category, burner defects and deposits in throttle valves.

着重从锅炉设计不合理、热负荷过高、煤种变化、燃烧器的缺陷及节流阀结垢等方面分析了水冷壁爆管的原因，指出必须进行锅炉改造。

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Cause analysis of the water cooled wall tube burst focused on irrational points of design, excessive thermal loading, changes of coal category, burner defects and deposits in throttle valves.

着重从锅炉设计不合理、热负荷过高、煤种变化、燃烧器的缺陷及节流阀结垢等方面分析了水冷壁爆管的原因，指出必须进行锅炉改造。

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