The method includes the step of coupling together first and second ductwork components.

该方法包括将第一和第二管道系统部件连接在一起的步骤。

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The performance of electric actuator is very important for the controlling of electric valve, even for the ductwork.

电动执行装置性能的好坏，对电动阀门甚至整个管道系统的控制都具有十分重要的影响。

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These measures enabled the removal of low ceilings and ductwork, and significantly reduced the home's energy consumption.

这些措施能够移除较低的天花板和管道系统，并显著降低家庭的能源消耗。

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But the energy consumed is much less than the energy delivered into the ductwork.

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Bridge operator's Forth Estuary Transport Authority (Feta) maintenance workers have installed several miles of ductwork to accommodate electrical wiring.

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Many homeowners will have to rearrange ductwork and interior walls to fit the high-SEER units, which can be twice as large as the ones they replace.

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