increment of angle of internal friction
phase angle {angle of phase difference}
variation of angle of attack
abrupt change of cross section
abrupt change of cross-section
activation method of cross section determination
alteration of cross-section
area of cross section of the main air flow
area of cross-section of nozzle
arrangement of cross-sections
Bearing capacity of cross section
building of cross section curve
capacity of cross section
Carry capacity of cross section
characteristic depth of cross-section