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九龍杯是酒杯的一種,傳說為明朝工匠所製[1]。用九龍杯飲酒之時,只要不斟滿,則與常杯無異。若斟得太滿,則酒會從底孔完全流光。故亦名公道杯或戒貪杯。
九龍杯利用虹吸原理運作[2]。杯內豎立一個龍頭,龍頸底有小孔,杯外面亦有一孔;龍頸內有複管,其外管上方與內管相通,外管對杯內開小孔,該小孔即為龍頸底之孔,內管則下連杯外之孔。如果加水不超過內外管相通之上口,則此杯與常杯相同;若水面超過了上口,則水就會注滿內外管壁之間,水即會循內管完全流出。
This article uses material from the Wikipedia article "九龍杯", which is released under the Creative Commons Attribution-Share-Alike License 3.0. There is a list of all authors in Wikipedia
food,liquor,alcohol,drink,beverage,coke