One-handed serving tray

作者: John W. Perkinson

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摘要: A serving tray, having an opening through which at least a portion of the server's hand may be inserted and support thrusts upwardly against wrist and/or forearm materially assists in carrying balancing laden has utility for use situations server must carry serve from tray with one hand.

参考文章(1)
Patrick Corvetti, Food and drink serving tray ,(1968)