电路中还首次采用了微波晶体直接调频方案。
The directive FM version of microwave crystal in circuit is used at the f...
成都市红星路下穿市政隧道首次采用了顶部开孔的自然通风方式。
The first use of urban tunnel with upper vents is HongXing road tunnel in ChengDu.
渡船为我国首次采用电力推进的滚装船铁路轮，柴油发电机组是渡船动力装置的核心。
The electric propulsion for train ferry is the first of its kind in china.
渡船为我国首次采用电力推进的滚装船铁路轮，柴油发电机组是渡船动力装置的核心。
The electric propulsion for train ferry is the first of its kind in china.
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