• 2022-11-01
    排水管道开槽埋管工序包括:
    A: (2)-(1)-(5)-(4)-(3)-(6)-(7)-(8)
    B: (1)-(2)-(3)-(4)-(5)-(6)-(7)-(8)
    C: (2)-(1)-(3)-(4)-(5)-(6)-(7)-(8)
    D: (1)-(3)-(5)-(4)-(6)-(2)-(8)-(7)