Optical-optical double resonance

optical-optical double resonance(OODR)

Cajal‘s double method

Cajal’s double method

controllable double-well optical trap

double double iron

Double optical circuit

Double optical feedbacks

double optical fiber coupler

Double optical fibers coupling

double optical path

double optical path-replacement method

double optical paths

Double optical tweezers

double-optical path

double-optical projection stereoplotter

microwave optical double resonance spectroscopy

optical double stars

time-divided double optical paths