The present research subject , in accordions with the state ' s building material standard requirements and the practical needs of construction , chooses three groups of reinforced bar samples with diameters of 20 , 22 and 25 respectively for comparative tests between the traditional manual method and the newly designed device 本課題嚴(yán)格按著國(guó)家相關(guān)的建材標(biāo)準(zhǔn)要求,參照建筑施工的實(shí)際需要,分別選取20 、 22 、 25三組不同規(guī)格的鋼筋試件,使用上述裝置與傳統(tǒng)的人工方法同步做對(duì)照試驗(yàn)檢測(cè)。