可在双代理(DA)和弹簧返回(简)版本。
Available in Double Acting (DA) and Spring Return (SR) version.
内装式、双端面、多弹簧、非平衡型、传动套传动。
It is of built-in type, double seal face, multi-spring, unbalanced type and drive sleeve transmission.
内装式、双端面、多弹簧、非平衡型、传动套传动。
It is of built-in type, double seal face, multi-spring, unbalanced type and drive sleeve transmission.
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