传输型六端口反射计是一种结构较简单、性能价格比较优良的微波测量装置.Microwaveline type six - port reflector is a microwave measurement apparatus with simpler structure and better price performance....
A steamer takes on a pilot before coming into a strange harbour.轮船进入陌生的港口前要雇用引航员。The steamer calls at several ports along the way.一路上,汽船在好几个港口停靠。One summer, pumping stations such as steamer general, maintenance, operatio...