词汇	convention business
释义	convention business 会议业务
随便看	Single Line Missile Assembly Building Single Line Observation single line of rails single-lineone-linediagram single-line one-line diagram single line operation single-line operation single line perforation single-line plan single-line policy single-line possession single-line protection system single line rail single line railway single-line railway single-line railway bridge single line register single-line register single line repeater single line representation single-line representation single line rivet joint single-lines single line scan television method single line screen