however, a single defect of this type in the seat may be ground out without engineering disposition and without repair weld providing the ground out area is not more than 1/2“ in length or width and not over 1/16” deep and is blended smooth without coming closer than 1/4” to the valve seating line.밑줄 친 부분 중점으로 번역 좀 부탁드려요~~~