本阀门结构为法兰连接，具有开启行程小、摩擦力小、耐磨等特点。
Flanged valves have following features: small opening stroke, small friction force when opening and shutting, and high abrasion resistance.
本阀门结构为法兰连接，具有开启行程小、摩擦力小、耐磨等特点。
Flanged valves have following features: small opening stroke, small friction force when opening and shutting, and high abrasion resistance.
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