3.2 Cofferdam grade

3.2.1 Diversion structures refer to the temporary water retainingand releasing structures used in construction period. Diversionstructures shall be determined as Grade 3, Grade 4 or Grade 5according to the objects of protection, failure consequence, servi ......（本文共 3618 字 , 2 張圖）     [閱讀本文] >>