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Valve&Fitting-Casting-Instrument-Seals-Meters-Tankfarm-Vessels-Pumps- Agriculture-Consulting-Jobs -About Us |
FLEXIBOX机械密封及联轴节 |
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波纹管密封
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典型双密封结构 |
![]() 靠工作介质自身循环
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外部循环式 |
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