|   试验号  |       开孔方向  |       开孔尺寸  |       加水量  |       误差列(空列)  |       电压误差(mv)  |       结胶皮时间(h)  |    
|   1  |       1  |       1  |       1  |       1  |       72  |       4.65  |    
|   2  |       1  |       2  |       2  |       2  |       112  |       5.61  |    
|   3  |       1  |       3  |       3  |       3  |       144  |       5.56  |    
|   4  |       2  |       1  |       2  |       3  |       81  |       7.59  |    
|   5  |       2  |       2  |       3  |       1  |       135  |       8.21  |    
|   6  |       2  |       3  |       1  |       2  |       78  |       4.93  |    
|   7  |       3  |       1  |       3  |       2  |       168  |       9.17  |    
|   8  |       3  |       2  |       1  |       3  |       107  |       5.76  |    
|   9  |       3  |       3  |       2  |       1  |       126  |       6.69  |