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阻火器的阻火层结构有砾石型、金属丝网型或波纹型。
The flame arrester fire resistance reservoir structure have gravel type, type or corrugated metal screen type.
youdao
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阻火器的阻火层结构有砾石型、金属丝网型或波纹型。
The flame arrester fire resistance reservoir structure have gravel type, type or corrugated metal screen type.
youdao