A.keep away from moisture B.keep away from heat C.keep away from cold D.keep away from fire
A.紙包裝材料 B.塑料包裝材料 C.金屬包裝材料 D.復(fù)合包裝材料
下圖屬于哪種托盤()。
A.輪式托盤 B.平托盤 C.柱式托盤 D.箱式托盤