It's made of bronze or iron powder, mold pressed under high pressure and then sintered under high temperature, and oil is soaked into the homogeneously spread tiny pores of the metal under vacuum. It....
Shandong Huifeng Nonwoven Fabrics Co., Ltd. was set up in 1998. We own the area of 170, 000 square meters, with fixed assets over USD15, 384, 000 and 400 staff members. We're specializing in....