进气口直经 mm

正中直经 conjugate diameter ; conjugata

垂直经济一体化 vertical economic integration

卷直经 Roll diameter ; naotsune vol

音圈直经 Voice Coil

直神经类 Euthyneura

卷直经有要求吗 Do volume diameter requirements ; Vol. I has always been a request

对直经过 cut across

准直经纬仪 collimation theodolite

直接经验 direct experience ; immediate experience ; store experience