butterfly valve
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butterfly valve
butterfly valve汉语翻译：【化】蝶形阀英语解释：名词 butterfly valve:a valve in a carburetor that consists of a disc that turns and acts as a...
butterfly valve汉语翻译：【化】蝶形阀英语解释：名词 butterfly valve:a valve in a carburetor that consists of a disc that turns and acts as a...