A.2‰ B.1‰ C.0.5‰ D.0
A.設(shè)計(jì)值±5mm B.設(shè)計(jì)值±10mm C.設(shè)計(jì)值±20mm D.設(shè)計(jì)值±30mm
A.0.1mm/m B.0.2mm/m C.0.3mm/m D.0.5mm/m