Italian term (edited): PALLINATURA

Pallinatura
Un tipo di annotazione composta da una forma chiusa che contiene del testo. Una pallinatura definisce le singole parti degli assiemi e le note di campo sui disegni.
http://www.componentsengine.com/site/page.wplus/Software-ges...
line balloon (callout) (n) A note added to a drawing to relate an alphanumeric code with a part. A line balloon usually consists of a circle or a regular polygon enclosing the code and a leader pointing to the part. They are used extensively in assembly drawings either to directly specify a part or give an index value that references a parts list or separate catalog.

Contemporaneamente
alla generazione della distinta del complessivo è possibile eseguire la pallinatura automatica
dell’assieme; è interessante notare che i ballon generati automaticamente sono modificabili e il cambiamento
del numero d’ordine si riflette nella distinta di assieme che viene aggiornata e riordinata
http://eprints.unifi.it/archive/00000261/01/Metodologie_di_i...

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Note added at 51 min (2008-08-27 13:33:26 GMT)
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Callout- text that identifies element of an illustration or any material such as a "pull quote" that is called out of the text
http://www.leprint.com/glossaries.html

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Note added at 53 min (2008-08-27 13:35:55 GMT)
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https://cadbim.usace.army.mil/MyFiles\1\7\MainText.pdf

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Note added at 1 ora (2008-08-27 14:12:47 GMT)
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Assembly Drawings

The assembly /sub-assembly drawings are drawings of discrete sub-systems showing in some detail how the component items fit together. Typical assembly drawings include gearbox drawings, roller drawings, guard system drawings.

The assembly drawing will generally include at least three orthographic views with sections as needed to clearly show all of the details and their relative positions. Overall and detail dimensions will be shown. The weight/mass of the assembly/sub-assembly will be noted. The drawing will include a parts list identifying all of the component details with quantities and materials and supply details. The assembly drawing will include a list of reference drawings and notes identifying the relevant codes and specifications and testing requirements.

The drawn separate items will be identified with leader lines to balloons which include the item reference number linking to the parts list.

The method of identifying the parts must be clear and unambiguous. The equipment as represented on the general arrangement drawing and the sub-assemblies as shown on the arrangement and assembly drawing should be clearly identified with plant item numbers. The relevant drawing numbers are obtained by reference to the plant items list. Plant items are annotated by leader lines to a double balloon.

http://www.roymech.co.uk/Useful_Tables/Drawing/Mech_Drawings...

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Note added at 1 ora (2008-08-27 14:27:36 GMT)
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I think that you can translate "pallinata" with "identified with leader lines to balloons" (provided with the details of each codified item)