国产在线观看午夜视频,日本女子下部视频午夜,国产美女精品自在线拍免费,大香伊蕉在人线国产2019,视频一区二区日韩无码精品,亚洲欧美日韩中文字幕在线

The steel-based copper-alloy inlaid solid-lubricated bearing is produced by compounding the rolled tin bronze in high-quality steel or cast die cavity with special process. The material cost is lowered down while the bearing capacity is provided. Solid lubricant is inlaid on the working surface according to working conditions to lower down the friction coefficient to realize the self lubrication.
It is especially applicable for operation condition with high load and low speed where it is hard to add lubricant.