A requirement concerning the measuring accuracy of the stop watch in accordance with ISO 3795, 5.6 has been introduced (5.1.8)关于秒表精确度的测定要求应符合 “ISO 3795 这一标准规范已经给予介绍。The number of specimens to be tested has been increased when so stated by ISO 3795, 6.2 (5.2.7)A requirement concerning reporting of burn rate (0 mm/min) in ac...