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Heinrich Hoffknecht
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Common Detailed Techniques For Electron Tubes Or Discharge Tubes
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Abstract
14,615. Hoffknecht, H. June 25. Tobacco pipes.- In pipes of the kind s h o w n, an indiarubber stopper or ring is employed to make the joint between the bowl 2 and the connecting- piece 3. A similar . ring may also be used between the connecting - piece 3 and the wooden stem 4.
GB190714615D1907-06-251907-06-25Improvements in Tobacco Pipes.
ExpiredGB190714615A
(en)