JB/T 3411.16-1999
内四方紧定螺钉 尺寸
Internal square set screws -- Dimensions
1999-05-20
HB 3057-1989
四方套筒扳手S=5～14
1990-04-11
HB 3058-1989
四方套筒扳手S=17～27
1990-04-11
JB/T 3411.33-1999
四方冲子 尺寸
Squarel piercer -- Dimensions
1999-05-20
HB 6173.2-1988
扳拧处尺寸与公差 四方
1988-04-09
WJ/Z 424.1-2000
火炮通用件 工具 外六角-外四方用扳手
QJ 996.19-1986
车床辅助工具 内四方紧定螺钉
1986-06-21
GB/T 3228-2022
螺栓螺母用装配工具 冲击式机动四方传动套筒的尺寸
Assembly tools for screws and nuts—Dimensions of machine-operated “impact” square drive sockets
2022-12-30
IEC 60191-6-3-2000
Mechanical standardization of semiconductor devices - Part 6-3: General rules for the preparation of outline drawings of surface mounted semiconductor device packages - Measuring methods for package dimensions of quad flat packs (QFP)
半导体器件的机械标准化 - 第6-3部分:表面贴装半导体器件封装外形图的一般规则 - 四方扁平封装的封装尺寸测量方法（qfp）
2000-09-29