A.磨光機(jī) B.板銼 C.細(xì)砂紙 D.抹布
A.10 B.11 C.12 D.15
A.采用開口銷時(shí)應(yīng)對(duì)稱開口,開口角度不宜小于45° B.采用開口銷時(shí)應(yīng)對(duì)稱開口,開口角度不宜小于60° C.采用開口銷時(shí)應(yīng)對(duì)稱開口,開口角度不宜小于75° D.采用開口銷時(shí)應(yīng)對(duì)稱開口,開口角度不宜小于90°