喇叭架背部配有手摇器，可以轻松将线阵音响吊上空中。
There is hand winch in the back of speaker truss , Line speaker can easily be hanging .
扩音器于20世纪开始被广泛使用，而著名的彩球手摇花也于20世纪50年代被劳伦斯•何其莫用到啦啦队当中。
Widespread use of the megaphone started in the 1900's and the famous pom pon was introduced in the 1950's by Lawrence Herkimer.
测距手摇动测距装置直到目标点的射程凹槽出现在显示器里。
The range operator cranked the range until the target pip was in the "range notch" on his scope.
手摇冲子研磨器，配合平面磨床使用，利用简单的按压滚轮，可方便的精密研磨加工。
Manual punch grinder is adapted to surface grinder. It can grind accurately and easily just when you press the roller.
手摇冲子研磨器，配合平面磨床使用，利用简单的按压滚轮，可方便的精密研磨加工。
Manual punch grinder is adapted to surface grinder. It can grind accurately and easily just when you press the roller.
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