antarctic circle ozon hole
GD circle global data circle
全局数据包通讯GDcircle
全局数据包通讯GD circle
prime vertical circle {= PV circle}
A shrinkage method combining with medium-length hole and shallow hole
electron-hole liquid drop (=electron-hole droplet)
hole by hole blasting technique
hole by hole detonating
hole by hole initiating
hole by hole initiation
hole-by-hole detonation
Hole-by-hole initiating
Hole-by-hole initiation