The traditional detecting missing holes on auto - carling is carried on through a artificial way . mainly , the workers detect the missing holes through compared auto - carling with the standard autocad blueprint and use micrometer calipers to measure the positions of holes 傳統(tǒng)汽車縱梁漏孔檢測主要以人工方式進行:檢測工人把縱梁和標準縱梁autocad圖紙進行比對來檢測是否有漏孔、用千分尺等工具手動測量孔心位置是否合乎要求。