A.4~6 B.6~8 C.8~10 D.10~12
A.由外向里看,由粗到細(xì)看 B.圖樣與說明結(jié)合著看 C.相關(guān)聯(lián)圖紙交叉看,建施與結(jié)施對(duì)著看 D.A、B、C三項(xiàng)結(jié)合
A.60 B.120 C.150 D.180