Firstly, the most fundamental things that you do every time you play, such as hand position, sitting position, hand movements, etc. , are difficult to explain in a textbook, whereas a teacher can show you instantly, what is right and what is wrong.
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Some people find a left-hand prompt which changes in length (such as when displaying pathnames) a distraction because it means the position you start entering commands at is constantly changing.
一些人发现可变长的左边提示符(例如显示路径名的时候)经常更改令人心烦，因为它意味着您开始键入命令的位置经常变化。
Often a hand held integrating sound level meter such as the Model 30 would be mounted on a tripod at a boundary position and, for example, a 15 minute measurement made.
通常，一个手持集成示范等30人是在边界上的三脚架安装位置和声级计，例如，一个15分钟的测量制成。
Our main products include handles, knobs, hand wheels, position indicator and so on. they are widely used in various machinery regions such as machine tool, printer, light industry and so on.
机械操作件主要有：手柄、星型把手、手轮，附件有位置显示器、位置指示表等；广泛应用于机床及印刷、纺织、轻工、包装、矿山、食品、医疗器械等各种机械的配套生产。
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