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GB191419793A
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Device for Producing High Vacua.
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Improvements in Vacuum Piston Pumps.
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High-vacuum rotary pump.
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GB191204166A
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Improvements in the Shaft Bearings of Rotary Pumps.
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|
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Method and apparatus for producing high vacuums.
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|
GB190927457A
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Improvements in and relating to Apparatus for Producing High Vacua.
|
|
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Rotary mercury vacuum-pump.
|
|
GB190816016A
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Improvements in Rotary Mercury Vacuum Pumps.
|
|
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|
Means for producing high vacuums.
|
|
GB190617741A
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Improved Rotary Air Pump
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Vacuum-pump.
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