“银合金”造句
2024年06月26日 02:58:53
在这和中心之间是一种铜
银合金.
Between this and the core is an alloy of copper and silver.
铜基合金电触头是
银合金触头的换代产品.
Copper - based alloy electrical contact is silver alloy contact replacement.
简要分析了
银合金变色的原因.
The reasons why the silver alloys tarnished are analyzed briefly.