digital instrument
数字仪表
数字式仪表
数字式仪器
数字仪器
数码化仪器
数字电表
digital photo elasticity
digital photo graphic system
Air photo area statistics
air photo interpretation
Digital Archived Digital Publish
Digital Radiography Digital Radiograph
Air Leakage Rate of Air Preheater
air to air heat recovery unit
air to air missile launching envelope
arctic air [= arctic air mass]
continental air [= continental air mass]
main air port exhaust air
marine air [= marine air mass