paperback. Condition: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Paperback. Pub Date :2007-06-01 Language: Chinese Publisher: China Standard Press ship vibration would interfere with the normal sailing ship or reduced crew and passengers comfort . causing their complaints and grievances . This standard gives the ship in different areas livability vibration evaluation criteria . Ships livability is 1 Hz ~ 80 Hz full frequency vibration j weighted rms (r.m.s.) to evaluate . This standard also includes the ship's livability instrument relating to the evaluati.Four Satisfaction guaranteed,or money back.