Butterfly simple structure, small size, light weight, only by a small number of parts.
蝶阀结构简单、体积小、重量轻，只由少数几个零件组成。
Butterfly simple structure, small size, light weight, only by a few parts.
蝶阀结构简单、体积小、重量轻，只由少数几个零件组成。
Butterfly valve features: (1) simple structure, small dimensions.
蝶阀的特点：(1)结构简单，外形尺寸小。
Butterfly valve features: (1) simple structure, small dimensions.
蝶阀的特点：(1)结构简单，外形尺寸小。
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