noun🔗Share螺旋千斤顶，丝杠千斤顶 A jack (mechanical lifting device) which is operated by turning a leadscrew."The mechanic used a jackscrew to slowly lift the heavy truck so he could change the tire. "为了更换轮胎，修理工用螺旋千斤顶慢慢地抬起了那辆重型卡车。technologymachinedevicetechnicalChat with AIVocabulary GamePractice Reading
