A.2 B.3 C.4 D.5
A.1.2mm B.0.6mm C.0.4m D.0.3mm
A.應(yīng)遠(yuǎn)離變形區(qū)布設(shè) B.應(yīng)離開(kāi)變形體布設(shè) C.應(yīng)結(jié)合變形體布設(shè) D.可任意布設(shè)