基本解释[經濟學]無帽螺釘英汉例句雙語例句Then screw nut did not try to jack up the entire turret components and the weight, the role without friction whereabouts.這時螺母沒有托住絲杆以及整個刀架部件的重量，由於摩擦阻力的作用而不下落。专业释义經濟學無帽螺釘