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Improvements in traps for preventing the passage of effluvia from domestic or other sinks
Improvements in traps for preventing the passage of effluvia from domestic or other sinks
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机译:改进了疏水阀,以防止污水从家庭或其他水槽中通过
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摘要
183,239. Evans, F. April 19, 1921. Traps.-A plate A is formed with one or more depending J-shaped pipes. The plate is adapted to rest at the top of a waste-pipe.
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