Granite parallels
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Precision Granite Parallels
Peb tuaj yeem tsim kho cov laj thawj granite nrog ntau qhov loj me. 2 lub ntsej muag (ua tiav rau ntawm cov npoo nqaim) thiab 4 lub ntsej muag (tiav rau txhua sab) version muaj nyob rau qib 0 lossis qib 00 / qib B, A lossis A. Granite parallels yog qhov kev pab tau zoo heev rau kev ua tshuab teeb tsa lossis zoo sib xws uas yuav tsum tau txais kev sim ntawm ob qhov chaw tiaj thiab panallel, tseem ceeb tsim lub dav hlau tiaj.