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- orifice[pneumatic]
- orifice, rectangular
- orifice, reentrant
- orifice ring
- orifice, rounded
- orifices
- orifice, sharp edged
- orifice, sharp edged diaphragm
- orifice, short pipe
- orifice spillway
- orifice spring
- orifice, square
- orifice, square edged
- orifice standard
- orifice, standard
- orifice, submerged
- orifice tap
- orifice, triangular
- orifice tube
- orifice, vertical
- orifice well tester
- orifice，aortic
- orifice，atrio-ventricular
- orifice，ceco-colic
- orifice，ejaculatory
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