1.刀口型直尺:knife straigjht edge a
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2.刀口尺: knife straigjht edge $"#M:V@
3.三棱尺three edges straigjht edge $XKUw"%
4.四棱尺four edges straigjht edge S(rnVsW%Ki
5.条式和框式水平仪 ~4c,'k@
bar form and square levels
0BAZWm
6.合像水平仪 imaging level meter y{XNB}E
7铸铁平板 cast iron surface plate /gn\7&