发明授权
US07382084B2 Spark plug having a precious metal tip 有权
火花塞具有贵金属尖端

Spark plug having a precious metal tip
摘要:
An object of the invention is to provide a spark plug having a discharge portion made of a precious metal tip, in which peeling of the precious metal tip from a surface of the discharge portion can be suppressed while spark abrasion, oxidation abrasion and abnormal abrasion of the discharge portion can be suppressed.
公开/授权文献
信息查询
0/0