penetration bomb

1. Forrestal application of cavity expansion theory to the model of penetration depth of the aerial bomb trilling into soil, and then, based on the penetrating depth, calculates the size of the crater created by the bomb explosion.
   Forrestal将空穴理论用于对土壤的侵彻模型，计算了航空炸弹对土壤的侵彻深度。
2. Computing method of penetrating depth of earth penetration bomb into concrete
   航空钻地炸弹侵彻混凝土深度的工程计算方法
3. Penetration into Soil of Aerial Bomb and Computation of the Explosion to Bear Fruits
   航空炸弹对土壤侵彻和爆炸效应的计算分析

noun

1. a bomb with about 30% explosive and a casing designed to penetrate hardened targets before the explosive detonates