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 EF9cHLqUc1OzHXSRakBe660aiiTWQctB+pZFw+iCXdZ+iOBIe0oYUoipQHtla9I3