特级做a爱片毛片免费看_变态 另类 国产 亚洲_中文字幕乱码视频中文字幕14_中文亚洲少妇自拍_无码国产天天一区在线观看_美女在线777在线_美女做爰高潮免费视频_伊人久久久A∨老熟妇色_韩国电影办公室3免费完整版_自拍偷亚洲精品重口

W90 tungsten copper bar is composed of 90% W and 10% Cu, its density is up to 16.75g/cm3, hardness reaches more than…

W85 tungsten copper bar is composed of 85% W and 15% Cu, its density reaches(15.90g/cm3), hardness more than HB240, electric conductivity is…

W80 tungsten copper bar is composed of 80% W and 20% Cu so that high hardness and melting point characteristics of tungsten…

W75 tungsten copper bar is composed of 75% W and 25% Cu, which not only has high density (14.50g/cm3), high hardness (≥HB195),…

W70 tungsten copper bar is composed of 70% W and 30% Cu so that it is harder than W50 and W60 rods.…

W65 tungsten copper bar has many advantages, such as excellent electrical and thermal conductivity, uniform texture, high density, high-temperature resistance and arc…

W60 tungsten copper bar is composed of 60% W and 40% Cu, which not only has high density (12.75g/cm3), high hardness (≥HB140),…

W50 tungsten copper bar is composed of 55% W and 45% Cu, which not only has high density (11.85g/cm3), high hardness (≥HB115),…

W50 tungsten copper bar is composed of 50% W and 50% Cu, which not only has high density (11.85g/cm3), high hardness (≥HB115),…