护木弹簧盒 Fender spring box

木弹弓 wooden slingshot

实木弹弓 solid wood slingshot

木偶弹珠台 Factory Pinball

弹木琴 play the xylophone

木材弹性异向性 the anisotropic elasticity of wood

木材弹性模量 [木] modulus of elasticity of wood

木材弹性极限 elastic limit of wood