military finfrared equipment
军用射击制仪器

• helicl gear
• helicoidal single material fibre
• heliconid
• helicopter fire control laser system
• heliocentric parallax
• heliochrome
• heliochromy
• helioctron
• heliograph
• heliography
• heliogravure
• heliometer
• helioscope
• helioscopic ocular
• heliosphere
• heliostat
• heliotrope
• heliotype
• helium
• helium-cadmium laser
• helium-cadmium metal vapor laser
• helium-cesium gas laser
• helium ground state
• helium lamp
• helium laser