名词
中文翻译：阻挡位置器同义词
同义词：
['blocking device', 'blocking element']
例句：
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1. The block positioner was used to prevent the machine from moving forward.
这个阻挡位置器被用来防止机器向前移动。
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2. The engineer had to adjust the block positioner to ensure proper functioning of the machine.
工程师不得不调整阻挡位置器，以确保机器的正常运作。
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3. The block positioner was crucial in maintaining the accuracy of the measurement.
阻挡位置器在保持测量精度方面起着至关重要的作用。