Pressure regulators are important pressure-regulating equipment in drip irrigation system.
压力调节器是滴灌系统中重要的调压设备。
The fresh air ventilator is an important equipment of air's quality regulating.
新风换气机是调节空气品质的重要设备，换热器是新风换气机的关键部件。
The fresh air ventilator is an important equipment of air's quality regulating.
新风换气机是调节空气品质的重要设备，换热器是新风换气机的关键部件。
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