商时驾舟的技术有桨划、篙杆撑和手推纤拉。
The boating in Shang Dynasty was used by oar, pole and manual pull.
本文以集合木制螺旋桨作为启示的出发点，从而想使弹性直杆振动问题能初步臻于一个比较更一般的处理。
The aim of this paper is to give a more or less general treatment of vibration of elastic non-uniform strut, such as composite wooden screw-propeller.
将预应力斗栱腹杆空间组合桁架加固技术应用于多层多跨工业建筑晗傅亟樯芰朔桨傅挠跋煲蛩睾蜕杓颇谌?。
The strengthening technology of the prestressed composite truss with tougong web members bars was used in the multi-storied factory building.
系统通过控制螺距控制单元(10)的杆(28)操作，螺距控制单元依次控制引擎速度和螺旋桨(14)的螺旋桨叶片(12)的螺距。
The system operates by a lever (28) which controls a pitch control unit (10) which in turn controls engine speed and also the pitch of propeller blades (12) of propeller (14).
系统通过控制螺距控制单元(10)的杆(28)操作，螺距控制单元依次控制引擎速度和螺旋桨(14)的螺旋桨叶片(12)的螺距。
The system operates by a lever (28) which controls a pitch control unit (10) which in turn controls engine speed and also the pitch of propeller blades (12) of propeller (14).
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