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  • 電動執行機構
  • 閘閥、蝶閥
氣動套筒調節閥通常由電動執行機構或氣動執行機構與閥體兩部分共同組成。直行程主要有直通單座式和直通雙座式兩種,后者具有流通能力大、不平衡辦小和操作穩定的特點,所以通常特別適用于大流量、高壓降和泄漏少的場合。《查看更多》
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熟妇人妻aV中文字幕老熟妇
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