Two kinds of packing: i. e. carbon with fiber and soft graphite are used. The sealing effect is excellent for high pressure boiler F. W. P.
选用碳素纤维填料和膨胀石墨填料混合使用，密封效果良好。
Two kinds of packing: i. e. carbon with fiber and soft graphite are used. The sealing effect is excellent for high pressure boiler F. W. P.
选用碳素纤维填料和膨胀石墨填料混合使用，密封效果良好。
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