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Sound is used.To join plastic surfaces together(a) audible(b) Infra-sonic(e) ultrasonic(d) reverberated |
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Answer» Answer: e) ultrasonic Explanation: Ultrasonic welding is an industrial TECHNIQUE whereby high-frequency ultrasonic acoustic vibrations are locally applied to workpieces being held together under pressure to create a solid-state weld. It is COMMONLY USED for plastics and metals, and especially for joining DISSIMILAR materials |
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