A.特大號砍柴刀 B.破冰斧 C.園林用播種器(鋼鐵結(jié)構(gòu)) D.手推割草機
A.90% B.95% C.98% D.99%
A.含鉛90%、含銅0.05%、含鉍0.05% B.含鉛99%、含銅0.05%、含鉍0.05% C.含鉛99.9%、含銅0.05%、含鉍0.05% D.含鉛99.99%、含銅0.01%