Shorter pili, usually referred to as fimbriae, are a structurally distinct group of extrusions which operate mostly in bacterial attachment to substrate or to other cells. |
Extremely careful metallography on tapered sections through the surface of the specimen has shown that fatigue cracks initiate at intrusions and extrusions. |
When extrusions of the highest quality are required, as in strong alloy aircraft parts, extrusion billets may be scalped before shipment to remove surface liquation. |
The all-aluminum space frame is made of stampings, castings and extrusions and is welded to the aluminum chassis. |
In some swept-wing aircraft, stepped extrusions are employed as machining blanks for spar caps with integral attachment fittings. |
After creating the dies to extrude the frame profiles, workers in Italy produced the extrusions. |