But,by this time,limited by the technology,all of the marine seismic devices of our country were bought from fremdness which were very costliness and mantained discommodiousness.

 
  • 但是,一直到现在,由于技术发展的落后,我国海洋石油勘探设备一直都是从国外进口,价格昂贵,维修很不方便。
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