为了测图的需要,所有由仪器测定的散列高程点,均可列入高程点这一名称.For mapping purposes all scattered heights fixed by instrument may be grouped under this heading.我国在西北的酒泉卫星发射中心成功地发射了一颗测图卫星“天绘一号”.China successfully launched a mapping satelliteMapping S...
飞行器可用绞车降低或升高.A winch allows the birds to be lowered or raised.一长排使舰身复位的缆绳一直通到福特岛上的绞车.The long row of righting cables stretched to winches on Ford Island.矿工们用绞车从矿坑中吊出矿石.The miners wound up ore from a mine....