求购2台干式制粒机

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