| 摘要 |
A welded portion is formed by mounting a synthetic resin frame, in which a count display device including character wheels, a driving device for operating the count display device, and a driving source of the driving device, are incorporated, within a casing from the open side of the casing, and welding at least one portion of the contact portion of the frame and said synthetic resin casing using an ultrasonic welding device.
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