adjustable bypass valve
adjustable exhaust bypass valve
pressure reducing valve reducing valve
valve disc type breath valve
16S-23S rDNA internal transcribed spacer ITS
18O-labeled internal standards
2 types of internal fixation
3D internal force analysis
3D internal force field
a string of internal problems
a wish for internal promotion
ABCD optical system with internal hard-edge aperture
Aberrant Internal carotid artery
Abosorable internal fixation