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Piercing

   Also found in: Dictionary/thesaurus, Medical, Legal, Idioms, Wikipedia 0.01 sec.
piercing [′pirsĀ·iŋ]
(engineering)

Piercing 

(1) An operation in forging and stamping carried out on presses and hammers to produce a hole or depression in an item by pressing a solid or hollow piercing tool or punch into the item. Piercing may also be used in preparation for subsequent hole expansion or broaching of billets on a mandrel and for preliminary marking of a through hole to be produced by subsequent punching.

(2) An operation performed with dies using a sharp-edged punch to remove the inner burr remaining in stamped objects after marking a through hole on them.

(3) An operation in the production of seamless pipe carried out on presses using a piercing tool or on piercing mills using a mandrel to obtain hollow tubing from ingots or billets.



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He looked it, and the piercing glitter that arose at times in his eyes was the same piercing glitter I had observed in the eyes of caged leopards and other preying creatures of the wild.
For example, by all their common and familiar performances--throwing large objects into the air which never come down; causing plants to sprout, grow visibly and blossom, in bare ground chosen by spectators; putting a man into a wicker basket, piercing him through and through with a sword while he shrieks and bleeds, and then--the basket being opened nothing is there; tossing the free end of a silken ladder into the air, mounting it and disappearing.
These brave words, said in a piercing voice, made all the other Marionettes cry.
 
 
 
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