bell mouth

Bell-shaped air intake fitted to some carburettors.
Found on http://www.encyclo.co.uk/visitor-contributions.php

Bell Mouth

The flaring or tapering of a machined hole, usually made at the entrance end because of misalignment or spring of the cutting tool.
Found on http://www.diracdelta.co.uk/science/source/b/e/bell%20mouth/source.html

Bell mouth

In Building services engineering and HVAC, a bell mouth is a tapered expanding or reducing opening in the end of a ventilation duct, so named because the taper can resemble that of a bell shape. They are primarily designed and used for return air or extract air purposes within building ventilation systems, more commonly located within ceiling void
Found on http://en.wikipedia.org/wiki/Bell_mouth

Bell Mouth

Bell-shaped air intake fitted to some carburetors.
Found on http://www.superglossary.com/Glossary/Technology/Motorcycle/

Bell Mouth

The flaring or tapering of a machined hole, usually made at the entrance end because of misalignment
Found on http://www.superglossary.com/Glossary/Business/Machine_Shop/

Bell Mouth

The flaring or tapering of a machined hole, usually made at the entrance end because of misalignment
Found on http://www.superglossary.com/Glossary/Business/Machine_Shop/
No exact match found