... in IC, chip, Yi Zhencrushed products. Like the SD card, pacifier, U disk and earphone plug. the auricular microphone shell. such as ... shell, battery shell, U disk, plastic watches, toys, toothpaste tubes, video & audio tape ,cassettes, inkjet cartridges, and computer floppy disks, ... amplitude control system, depending on the pressure change and fluctuation of voltage automatic compensation.10.the PET ...