n.飛機螺旋槳

Moreover, they are also quieter, as they are not driven by an airscrew. 此外，由于不用空氣螺旋槳驅(qū)動，所以噪音也比較

The winding method of girder of airscrew isn t the same as the revolving body. 相對于干法纏繞成型而言 ,濕法纏繞成型可有效降低復(fù)合材料的制造成本。

As far back as 400B.C., the Chinese were using the airscrew principle in building children's toys. 早在公元前400年，中國人就在兒童玩具中使用了這種空氣動力學(xué)的原理。

The winding method of girder of airscrew isn't the same as the revolving body.The winding method and system design is described in the paper. 本文闡述了葉梁纏繞原理和葉梁纏繞機的總體設(shè)計,介紹了葉梁纏繞機的主軸纏繞機構(gòu)和放卷機構(gòu)。

Dynamic aortic valve, a novel design for left ventricular assistance is proposed.An impeller similar to the airscrew is placed in the position of aortic valve. 提出左心機械輔助的一種新設(shè)想-動力性主動脈瓣，在主動脈瓣的位置設(shè)置一可主動旋轉(zhuǎn)的螺旋槳式機械性瓣葉(葉輪)。

Crankshaft is marine the crucial part of engine, coupling derv engine and airscrew transfer drive, be known as 10 thousand tons annulus " heart " " heart " . 我國造船業(yè)數(shù)拾年以來一直欠缺這顆"心"。因為技能被海外企業(yè)把持,曲軸價錢高且難定貨,柴油機岀產(chǎn)廠訂不到不可岀產(chǎn)柴油機,船廠買不到主機不大敢接船舶貨單。"