Sierpinski垫片天线
Sierpinski gasket antenna
W型缠绕垫片
W type spiral wound gasket
安全阀调整垫片
relief valve adjustment shim
波齿复合垫片
corrugated complex gasket
Corrugated serrate composite gasket
corrugate metal sheet composite gasket
波纹金属包嵌石棉垫片
corrugated metal gasket with asbestos inserted
差速器轴承垫片
differential bearing shim