A.每孔1片,每片3點(diǎn) B.每孔2片,每片3點(diǎn) C.每孔3片,每片2點(diǎn) D.每孔3片,每片3點(diǎn)
A.抽査30%,允許偏差5mm B.抽査25%,允許偏差6mm C.抽查25%,允許偏差5mm D.抽査30%,允許偏差6mm
A.士4% B.±5% C.±6% D.±8%