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jackscrew 【機械工程】螺旋起重器。

jackshaft

13a , ; rectangular connectors for frequencies below 3 mhz ; part 7 : detail specification for a range of connectors with polarized guides or jackscrews and size 16 round contacts ; removable crimp contact types with closed crimp barrels , rear insertion front release , with assessed quality 頻率低于3mhz的矩形連接器.第7部分:一系列矩形連接器的詳細規范:具有評定標明極性式插孔,螺紋尺寸為16