累积修订（包括备用页）占手册总页数的60%以上时，应重新编写手册。
AA. When total revisions including left pages, above 60% of the total pages in the manual, a reassure of the manual should be prepared.
BB. When accumulated revisions including back-up pages, total over 60% of the total pages in the manual, a reissue of the manual should be prepared.
CC. When accumulated revisions including left pages, above 60% of the total pages in die manual, a revise of the manual should be prepared.