... is more smooth and stable. (3)ultrasonic quilting machine of mattress bed cover Technical parameter Model NK-JM2012Frequency 15KHZ, ... *2300MMSpeed 8-20M/MINWeight 6800KG (4)ultrasonic quilting machine of mattress bed coverApplied range Car tarpaulin, Car seat covers, ... , tents wardrobe, washing machine covers, mummy bag, blanket, cosmetic bags, suit cover, bed cabinet, sauna kits cover, shoes , PVC ...