5.4.1 After an excavation cross-section is formed，cross-section survey shall be made.
5.4.2 The interval of the cross-section survey shall comply with the requirements in Table 5.4.2.
Table 5.4.2 Invertal of cross-section survey /oJ+EEgl2uCOmyKDW7MAMbwrhkb/LUVq7yj2KFaIgXzc8iv/m551hJrG6c6/AEMU
