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The top documents tagged [admission of sealing]
[1967 Dec. 5] US3355817 Sealing Means for Rotary Drum Heat Exchanger
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![[1967 Dec. 5] US3355817 Sealing Means for Rotary Drum Heat Exchanger](https://cdn.vdocuments.net/doc/330x215/5695d4191a28ab9b02a048df/1967-dec-5-us3355817-sealing-means-for-rotary-drum-heat-exchanger.jpg)