This series of crushers has been developed and improved by incorporating the advantages of the technology from both at home and abroad so that the structural design will be further optimized. The features of rational combination design of three crushing chambers, novel adjusting me chanism, effective control of uniformity of the product fineness easy access for maintenance have made the hammers and screen plates replaced more easily. All the wearing parts are made by using new type of high alloy abrasion material with multiple elements so as to assure the abrasive property and impact-resisting property of hammers and lining plates. This series of crushers offers stable operation in an environment of low dust and less power consumption. Thus PC-D Super-Fineness Energy-Saving Crushers are provided with five outstanding advantages as compared with conventional crushers.