工字型平尺的两平行面能确保平尺的稳定、轻便。如需要，可在端头提供把手。 花岗石平尺 Straight RulesJB/T7978-1999用直线度平面度测量应用。
For inspecting the straightness and flantness. 编号
No规格
Dimension
mm工作面直线度公差
Beeline tolerance of working surface
(μm)上下工作面平行度公差
parallelism tolerance between the upper and lower measuring surfaces (μm)侧面对工作面的垂直度
perpendicularity between side & measuring surface (μm)精度00
Grade00精度0
Grade0精度00
Grade00精度0
Grade0精度00
Grade00精度0
Grade0112-1001
112-1002
112-1003
112-1004
112-1005400×60×25
630×100×35
1000×160×50
1600×250×80
2000×300×1001.6
2.1
3.0
4.4
5.41.6
3.5
5.0
7.4
9.02.4
3.2
4.5
6.6
8.13.9
5.3
7.5
11.1
13.58
10.5
15
22
2713
18
25
37
48
