@PPathole @Erdayastronaut @SpaceX @Caspar_Stanley @IzanRamos2002 Some small tubes & wiring need to be nested in a bigger tube for thermal protection, kinda like conduit in a house.
Engines themselves & booster base are extremely robust. High strength stainless steel is bulletproof to a handgun at ~2.5mm thickness. Booster dome is 4mm.
@PPathole@Erdayastronaut@SpaceX@Caspar_Stanley@IzanRamos2002一些小管子和；布线需要嵌套在一个更大的管中进行热保护，有点像房子里的导管。
发动机本身；助推器底座非常坚固。高强度不锈钢在2.5mm厚的手枪上是防弹的。增压器圆顶为4mm。