average velocity， mean velocity

group velocity and phase velocity

ratio of pulp velocity and sire velocity

velocity derived from velocity spectrum

Evil-suppressing Incident

SanLu Milk incident

Tian’an Warship Incident

1．28 incident

12C(4+) incident ion

9·11 incident

9·18 incident

a single incident will not suffice

A Small Incident

accident and incident investigation

actual incident angle

aircraft incident

Analysis Incident in Shuikou Hydropower Plant

analysis of Sanlu incident

Analytical introducing incident wave

angle of incident