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Summary
DescriptionAir valve (model and workings).PNG
English: Air valve model and workings
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Made by uploader (ref:高堂彰ニ著、『水道の本』、日刊工業新聞社、2011年11月16日初版1刷発行、ISBN9784526067808)
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{{Information |Description ={{en|1=Air valve model and workings}} |Source =Made by uploader (ref:高堂彰ニ著、『水道の本』、日刊工業新聞社、2011年11月16日初版1刷発行、ISBN 9784526067808) |Author =[[User:Shig