短語詞組短語trunk line route 乾線逕路trunk air route [軍]軍用航空乾線trunk mail route 乾線郵路secound -class trunk mail route 二級乾線郵路first -class trunk mail route 一級乾線郵路industrial trunk route [工經(jīng)]工業(yè)乾線Tianjin trunk route 天津乾線trunk route detail 航路乾線domestic trunk route network 國內(nèi)乾線網(wǎng)絡(luò) 返回 trunk route