circumferential

circumferential riveting

圆周铆钉法

Fig.10 Comparison of Aa% of collagen in different circumferential direction of aortic arch(section A),stained with Anilin Blue,10A,superior wall; 10B,inferior wall ×4

图10主动脉弓(切面A)胶原纤维相的周向比较。苯胺蓝染色，10A：血管上壁，10B：血管下壁，×4

Two patterns of air plane engine inlet hot-air anti-icer are introduced in this paper, one is circumferential anti-icer, the other is double skin corrugated chord direction anti-icer.

摘要飞机发动机防冰飞行安全具有十分重要的意义，于热气防冰系统，前缘防冰器的结构型式防冰的效果影响很大。