基本解释[经济学]无帽螺钉英汉例句双语例句Then screw nut did not try to jack up the entire turret components and the weight, the role without friction whereabouts.这时螺母没有托住丝杆以及整个刀架部件的重量，由于摩擦阻力的作用而不下落。screw without nut更多例句专业释义经济学无帽螺钉