空对地通信
air-ground communication
空对地通讯
air-to-ground communication
空对地无线电频率
air-to-ground radio frequency
空对空通信
air-to-air communication
空对同轴电缆
air-spaced coaxial cable
绝对地址
AA; absolute address
绝对地址单元
specific address location
绝对地址汇编程序
absolute assembler
绝对地址装入程序
ABSLDR; absolute loader
绝对地租
absolute rent
净化空气总管
clean air manifold
净空
headroom
clear space
净空高度
head room; head-room clearance; overhead clearance
净空间
clear space
静止空气粘滞性
viscosity of stationary air
绝对空间
absolute space
绝对真空
absolute vacuum
军事航空管制
military air-traffic control
卡尔真空烘箱
carr oven
开放领空
open skies