Daily maintenance:118

If A repairs alone for 6 days, let B repair alone 10 days.

It is deemed that Party A and Party B cooperate for 6 days, and then Party B completes 5/ 12 in 4 days.

1/ 18X6= 1/3

B 4 days: 5/12-1/3 =112.

Demand for independent maintenance:1÷ (112 ÷ 4) = 48 (days).