排挡臂开口线与引擎轴心对齐，不可偏移。
The shift arm aperture line shall aligned with the engine main axle center line, without any displacement.
三天过去了，我惊讶地再次看到：所有的开口都是用细细的白线缝起来的，看上去就像北方冬天树枝上的冰晶。
Three days went past, and I was surprised to see it again: all the openings were sewed up by thin and white thread and they looked like the ice crystal on winter's branches in the north.
这种线控开口器属于医学器械。
The control-by-wire mouth gag pertains to medical device field.
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