单词	跑道视程仪
释义	跑道视程仪transmissometer
随便看	open-style arrowhead stroke open subcomplex open subgroup open subprogram open subroutine open-subroutine opens up a fine prospect, gradually improving, as one's prospects open superstructure open surface open surface degassing open switch open syllable open symbol open system open--system open system architecture open-system architecture open system architecture，osa open system call open system environment open system environment {=ose} open system interconnection open-system interconnection open system interconnection layer open system interconnection (osi)