What does the manual of electric butterfly valve mean? In China, the earthquake resistance and earthquake resistance of buildings and their auxiliary structures have become urgent. It is necessary to quickly improve the understanding of building electromechanical seismic design, which plays an extremely important role and significance for the earthquake resistance and disaster reduction of buildings! Vibration and noise control of water chillers and water pump units in the machine room Solution for noise control of water chillers and water pump units: 1. Hoses are used to connect water pumps, water chillers, fan coil units, air conditioning units and other equipment with water pipes, so as not to transmit vibration to pipes. There are two types of hoses: soft receiving and stainless steel bellows