阑尾呈圆锥形，不易造成腔内梗阻。
The conical configuration of the appendix makes obstruction of the lumen unlikely.
风扇环形外腔产生的正压湍流射流在内腔负压汇流作用下形成锥形风幕流场，将处于流场范围内的气体及粉尘严密封闭起来，使安全生产得到保障。
The tapered windscreen flow field of the fan is composed of the outer ring turbulent jet and the inner sink, which tightly closes gas and dust to ensure the safety production.
在图9所示结构中，内支撑锥形弹簧通过其上下振动，阻止颗粒沉积到密封腔中。
As the infrastructure shown in Graph 9, the inwardly-sustaining cone-shape string prevents particles from depositing into the sealed cavity, via its vibrating up and down.
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