... 耐油密封胶 Oil-resistant sealant 双流环形油密封 double-ring oil sealing 油密封式旋转真空泵 oil sealed rotary vacuum pump ...
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double-ring sealing oil system 双流环密封油系统
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Exclusive Rotork double 'o' ring sealing for proven protection against leakage in oil-filled service.
独家罗托克双重澳环密封证明防止渗漏充油服务。
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