A.直角尺 B.百格網(wǎng) C.鋼尺 D.經(jīng)緯儀
A.1% B.2% C.3% D.5%
A.不應(yīng)大于5mm B.不應(yīng)小于5mm C.不應(yīng)大于10mm D.不應(yīng)小于10mm