基本解释蜗杆；无止螺旋；螺旋杆词组短语短语endless tangent screw sextant 无限正切螺丝型六分仪;[水运]微调螺杆六分仪endless tangent screw [水运]微调蜗杆螺钉endless s screw 蜗杆elevating endless screw 升降蜗杆endless screw worm 蜗杆endless screw更多词组专业释义经济学蜗杆