The mechanism is made up of gear and gear rack can get rid of dead point.
提出了一种齿轮齿条机构产生匀速往复直线运动并能克服死点的方法。
At the same time, introduce the principle of side core-pulling mechanism of gear and rack injection mold, and design gist of a rack.
掌握长抽距或斜抽芯塑件的结构工艺分析及抽芯距、抽芯力的计算，齿轮、齿条注射模侧向抽芯机构的原理和齿轮、齿条设计要点尤其关键。
It is supposed to introduce the technology of gear-rack driven mechanism and nut-screw safety mechanism from Germany.
目前，三峡升船机引入德国技术，拟采用齿轮—齿条爬升机构、长螺母柱—短螺杆安全机构。
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