短語詞組短語endless tangent screw sextant 無限正切螺絲型六分儀;[水運(yùn)]微調(diào)螺桿六分儀endless tangent screw [水運(yùn)]微調(diào)蝸桿螺釘endless s screw 蝸桿elevating endless screw 升降蝸桿endless screw worm 蝸桿endless chain conveyer screw 輸送螺旋endless chain conveyer tangent screw 微調(diào)蝸桿螺釘 返回 endless screw