无螺纹的 meaning in English

threadless
unthreaded

Hand - held non - electric power tools - safety requirements - assembly power tools for non - threaded mechanical fasteners
手持非电动工具.安全性要求.无螺纹的机械紧固件用的装配动力工具
Connecting devices - electrical copper conductors ; safety requirements for screw - type and screwless - type clamping units - part 2 : particular requirements for clamping units for conductors from 35 mm 2 up to 300 mm 2 included
连接器件.电气铜导体用有螺纹和无螺纹的线夹部件的安全要求.第2部分:导体截面为35mm2 300mm2的特殊要求