steel base的用法和樣例：
例句
- Heavy wires can be welded singly to metal base parts.
粗線(xiàn)能單獨和金屬基體部件焊接在一塊。 - Nonmetallic materials are those materials such as woods, plastics, rubbers, epoxy resins, ceramics and diamonds that do not have a metallic base.
非金屬材料是指如木頭，塑料，橡膠，環(huán)氧樹(shù)脂，陶瓷及金剛石等那些不含有金屬基材的材料。
