air transportation造句
(31) Abstrac:China's air-freight service market is growing at high speed, but their competitiveness compared with foreign air transportation giant, is still worrying.
(32) Currently, the US air transportation management is dependent mainly on NAVAR.
(33) Any substance which presents a danger during air transportation that is not covered by other classes.
(34) Sea, land and air transportation go hand in hand, water, electricity, roads, communication facilities improved.
12