日本熟妇色熟妇在线视频播放_性国产videosgratis极品_伊人中文字幕在线观看_一区二国产好的精华_国产精品深夜福利免费观看_日韩一区二区天海翼_欧美午夜片欧美片在线观看_日韩美女福利18禁_色五月五月丁香亚洲综合网_99无码熟妇丰满人妻啪啪

Application of H65 brass: H65 brass has sufficient mechanical property and processing property, and the hot and cold pressure performance is good with gold color. It is mainly used for various hardware products, lamp, pipe fittings, zipper, plaque, rivet, spring, sedimentation filter and so on.
Application of H68 brass: it has good plasticity, higher strength, good cutability and good hot and cold processing performance, and is easy for welding and corrosion resistant. It is generally used for various cold punching parts and deep punching parts, radiator shell, corrugated hose, waveguide tube, door, lamp and so on.
Application of HPb59-3 lead brass: the hot and cold processing performance of HPb59-3 lead brass is good with excellent cutability. It is usually made into various pin bolts, screws, gaskets, small hardware, pipe fittings, bearing retainer and so on.
Application of H59-1 lead brass: it is a kind of lead brass with wide application, which has the characteristics of good cutability and good mechanical properties, and can withstand cold and hot pressure processing. It is easy for welding, and has good brazing and good stability for general corrosion. However, it has the trend of corrosion fracture, and is mainly used for air conditioner valve, hardware machinery and so on.