Engineering, 29.04.2021 15:40 maddy1276
High-frequency gluing machines are widely used in modern woodworking plants. Which one of the following statements is CORRECT concerning this type of equipment? a. Platens and electrodes are heated in less than one minute. b. Adhesives used in high-frequency gluing are made from thermoplastic resins. c. High-frequency radio waves penetrate the wood and heat the glue line. d. For this type of gluing, generators must produce frequencies over 50 megahertz.
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High-frequency gluing machines are widely used in modern woodworking plants. Which one of the follow...
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