Underwater baseplate installation in advance is needed for semi - submersible platform pre - drilling well.半潜式平台预钻井,需要预先安装水下基盘.The baseplate locates outside the handle, and has the rotary connection with handle through t...
The centre aims to help disadvantaged areas of Europe, mainly by fostering new businesses.该中心旨在帮助欧洲的贫困地区，方法主要是通过扶持新型商业。I was disadvantaged by illness.我因病而处于不利地位.The disadvantaged students in class are existed in the scho...