| Digest Nr | Subject and Author |
 |
| 2016.12.02.03 |
Polyethylene Sponge Gaskets for Ampico Valves, from Spencer Chase |
| 2015.02.24.03 |
Sponge Neoprene for Valve Seats, from Ralph Nielsen |
| 2015.02.22.05 |
Sponge Neoprene for Valves, from D. L. Bullock |
| 2015.02.20.04 |
Sponge Neoprene for Valves, from John A. Tuttle |
| 2015.02.19.09 |
Sponge Neoprene for Valve Seats, from D. L. Bullock |
| 2012.10.26.02 |
Sponge Rubber Valve Cores Survive 20 Years, from Bob Taylor |
| 2012.10.23.03 |
Sponge Rubber Valve Cores, from Bruce Grimes |
| 2012.10.21.06 |
Sponge Rubber Valve Cores Survive 20 Years, from Bob Taylor |
| 2011.03.02.02 |
Source of Sponge Rubber for Valve Facing Material, from John Meadows |
| 2011.03.01.05 |
Sponge Neoprene, from Robert Loeffler |
| 2011.03.01.04 |
Source of Sponge Rubber for Valve Facing Material, from Spencer Chase |
| 2011.02.28.02 |
Sponge Neoprene is Original Valve Facing Material, from Bill Maguire |
| 2005.10.19.10 |
DuPont "Tyvek" & Sponge Neoprene SC-43, from Bob Taylor |
| 2000.07.05.09 |
Sponge Silicone Unit Valves from PPCo, from John A. Tuttle |
| 2000.07.04.08 |
Sponge Neoprene Valves, from Bob Taylor |
| 2000.07.03.03 |
Sponge Neoprene Unit Valves from PPCo, from Brian Thornton |
| 2000.07.01.04 |
Sponge Neoprene Unit Valves from PPCo, from Andy Taylor |
| 2000.01.23.10 |
Sponge Neoprene in Reproducing Piano Valves, from D. L. Bullock |
| 2000.01.23.09 |
Sponge Neoprene Not in Dynavoice Valves, from D. L. Bullock |
| 2000.01.22.16 |
Sponge Neoprene in Reproducing Piano Valves, from Craig Brougher |
| 2000.01.22.15 |
Sponge Neoprene in Dynavoice Valves, from Tom Lear |
| 2000.01.21.15 |
Valves with Sponge Neoprene, from Bob Taylor |
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