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Hinge-joint: The pin that fits through pieces of metal tubing to create the hinge used for lockets, cases, boxes etc. Hollow ring-ball: Hollow ball with a ring attached; used in assembling jewelry.
Hinge-joint: One of the three or more pieces of metal tubing forming with a pin a hinge for a locket, etc. I Ingot Molds: A mold usually made of iron and with adjustable walls to produce a variety of sizes of cast metal bars or ingots.
See also: Channel, Oval, Mechanical, Jewel, Glass
 
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