“銀合金”造句
2024年06月26日 02:58:53
在這和中心之間是一種銅
銀合金.
Between this and the core is an alloy of copper and silver.
銅基合金電觸頭是
銀合金觸頭的換代產(chǎn)品.
Copper - based alloy electrical contact is silver alloy contact replacement.
簡要分析了
銀合金變色的原因.
The reasons why the silver alloys tarnished are analyzed briefly.