我需要1套的轧机，哪家可以做，货到洛阳

医疗机械设备行业怎么样？学机械设计制造及其自动化专业的去做医疗设备对口吗？

造纸机械设备中，是否应用大量凸轮分度器去控制？

德国机械设备制造业联合会(VDMA)的液压密封培训教材，ppt格式，一共19个压缩包。目录如下： Basics of Sealing Technology Application fields for fluid seals Seal types Sealing mechanism Friction Parameters influencing sealing mechanism and friction Sealing Materials Material overview Thermoplastic elastomers Elastomers Thermoplastics Manufacturing Processes for Seals Processing of rubber and rubber fabrics Processing of plastics by injection moulding Processing of PTFE Engineering Design Guidelines Introduction Basic function of the seal Seal assembly Sealing surfaces Gaps Wipers/scrapers Flow turbulences Excess pressure loads “Seal-friendly“ surfaces Concentricity Installation spaces for O-rings Installation spaces for lip seals Installation spaces for chevron packings Installation spaces rubber-activated coaxial seals Installation spaces for compact seals Installation spaces for guide tapes Typical design errors involving seals Favourable design features for seal assembly Standards Seal Types Hydraulic seals Pneumatic seals Static seals Rotary seals Application Examples Hydraulics Pneumatics Failures Failure causes Failures (examples) Company Contacts

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