求翻译：钻进中应用检孔器检孔，检孔器用钢筋笼做成，其外径等于设计孔径，长度等于设计孔径的4-6倍，按要求检查钻进中和终孔的孔径；是什么意思？

Application inspection hole drilling device inspection holes, inspection holes Used for steel cage made of, its diameter equal to the design diameter, length equal to the design of aperture 4-6 times the required final inspection and drilling holes in the aperture;

正在翻译，请等待...

Sneaks in applies examines Kong Qijian the hole, examines Kong Qi to make with the reinforcing cage, its outer diameter was equal to the design aperture, the length was equal to the design aperture 4-6 time, sneaks in the neutral end hole aperture according to the request inspection;

Application inspection hole inspection hole in drilling, inspection holes used for reinforcing steel bar cage, outer diameter equal to the design of aperture, 4-6 times the length equal to the design of aperture, as required to check the drilling and hole diameter;

Application inspection hole drilling device inspection holes, inspection holes Used for steel cage made of, its diameter equal to the design diameter, length equal to the design of aperture 4-6 times the required final inspection and drilling holes in the aperture;