平行跑道分隔
parallel runway separation
近间距平行隧道
small spacing parallel tunnels
近平行背斜脊
subparallel anticlinal ridge
近平行地壳隆起
subparallel crustal ridge
平面平行近似
plane-parallel approximation
长焦距平行投照技术
Distant paralleling technique
大口径、长焦距平行光管
large-aperture and long-focus collimator
可变节距平行调节
variable pitch propeller control
小间距平行隧道
small spacing parallel tunnel
等温竖直平行平板
isothermic vertical parallel plates
isothermal vertical parallel plates
多棒平行平面腔
multirod plane plane resonator