news DIN 45673 Noise Attenuation Optimization of Foaming Relay Agent 1027 in Magnetic Floating Train Shock Absorbing Pad Foaming Delay Agent 1027: "Noise Reduction Magician" in the Shock Absorbing Pad of Magnetic Float Tr... 03/1962DIN 45673 Noise Attenuation Optimization of Foaming Relay Agent 1027 in Magnetic Floating Train Shock Absorbing Pad