の修理を

repair of

→ の
phrase Rare #32,511
repair of の indicates what is being repaired, and を marks the repair as the object of a following verb. The phrase is usually followed by expressions such as する, 頼む, or お願いします.
JA: 自転車の修理をお願いします。
EN: Please repair my bicycle.

息子にドアの修理をしてもらった

I had my son repair the door.

彼女が屋根の修理を手伝いましょうかと言った時、彼は大喜びしました

When she offered to help repair the roof, he was overjoyed.