There's probably more than one way to accomplish this, but you'll do it by mounting a sonar sensor on the robot's left side.
有多种实现这一目标的方法，但是我们采用的方法是在机器人的左边安装一个声纳传感器。
Holes around the circumference and in one side face facilitate mounting.
沿圆周和一个侧面上的孔方便了安装。
Since the outer ring has a shoulder on only one side, the outer ring may be removed. This is often advantageous for mounting.
磁电机轴承外圈与内圈只有单面相连，因而拆卸方便，利于安装。
Since the outer ring has a shoulder on only one side, the outer ring may be removed. This is often advantageous for mounting.
磁电机轴承外圈与内圈只有单面相连，因而拆卸方便，利于安装。
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