主要特点：正压防爆，免维护，高效率和高可靠性。
The main features: plus pressure explosion-protection, free maintenance, high efficiency and high reliability.
当要求防爆时，可用防爆仪表、阀门和传感器；
When blast protection is required, a blast protection instrument, valves and sensors can be used.
当要求防爆时，可用防爆仪表、阀门和传感器；
When blast protection is required, a blast protection instrument, valves and sensors can be used.
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