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- 2016-10-26 09:03
- Teflon (PTFE or F4 in short) is one of the strongest corrosion-resistant materials in the world. But, In the other side,
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- 2016-10-23 13:55
- Wafer type butterfly valve1. DesignManufacture: API609, GB12238, JIS B20022. Face to Face Dimension: API609, GB12221, JI