pack upper layers and exploit lower layers

10 layers soil model

3 layers network system structure

3D-turbuIent boundary layers

3-layers

6-Layers-Serials

a measure word for layers

a phenomenon of apparent increase of layers

adaptation layers

added layers on pavement

adhesion of layers

Al-Cr binary layers

Al-Cr-Ce ternary layers

all salt exposed layers

Alternating Layers

Al-Ti binary layers

Al-Ti layers

Al-Ti-Ce ternary layers

ancient culture layers

animation layers