Ⅰa、Ⅰb、Ⅱa、Ⅱb metal cation(M+ 、M2+)

section a-a a-a

section b-b b-b

Anti-seismic and seismic-relieving measures

Seismic activity parameter

Seismic activity parameter Wq-value

volcanic and seismic activity

A and B bar

A and B braces

a and b coefficients

A and B male sterile line capable of working as a

A and B polarization switching

A and B roll editing

A and B rolls

A and B structure

A b-value

A(b)-value

A-A-A conjugation structure

accurate calculation of A and B