前缘部 meaning in Chinese

costal region
exterior region

Because these projectiles attain hypervelocity within the atmosphere and are subjected to enormous heating as well as aerodynamic loads , the survivability of the front region of projectile wing is very important for designer to consider
由于这类弹丸在大气中高速飞行，并受到剧烈的气动加热及空气动力负荷的作用，因此，弹翼前缘部的生存能力就成为弹丸设计中必须要考虑的问题。