[甘肃地方标准] DB62/T 4320-2021 饲用高粱 陇草1号
[国外标准] BS 4320-1968 Specification for metal washers for general engineering purposes Metric series
[轻工行业标准] QB/T 4320-2012 鲜花包装纸
[航空标准] HB 4320-1989 开槽垫片