They are widely used as gas safety shut-off valves for industrial and commercial combustion systems.
它们被广泛用作用于工艺和商业燃烧系统的气体安全切断阀门。
Components for containment enclosures - Part 4: Ventilation and gas-cleaning systems such as filters, traps, safety and regulation valves, control and protection devices.
密封罩用组件。第4部分：通风和气体清洁系统(如，过滤器和疏水阀)的安全和规定。阀门、控制和保护装置。
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