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2. Ultrasonic welding - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_welding

   Ultrasonic welding does not damage surface finish because the high-frequency vibrations prevent marks from being generated, which is a crucial consideration for many car manufacturers, . [10] Ultrasonic welding is generally utilized in the aerospace industry when joining thin sheet gauge metals and other lightweight materials.

3. Primer (paint) - Wikipedia

   en.wikipedia.org/wiki/Primer_(paint)

   Primer reduces the number of paint coats needed for good coverage and even color. A thin layer of paint may still be permeable to water. Water can permeate into the wood and cause warping, mildew, or dry rot. Primer improves the waterproofing of the finish. [4] Primers are not used as part of a wood stain treatment because they obscure the wood ...

4. Weld-On - Wikipedia

   en.wikipedia.org/wiki/Weld-On

   Weld-On is a division of IPS Corporation, a manufacturer of solvent cements, primers, and cleaners for PVC, CPVC, and ABS plastic piping systems. Weld-On products are commonly used for joining plastic pipes and fittings. Weld-On also manufactures specialty products from repair adhesives for leaking pipes, pipe thread sealants / joint compounds ...

5. Weld quality assurance - Wikipedia

   en.wikipedia.org/wiki/Weld_quality_assurance

   Weld mapping is the process of assigning information to a weld repair or joint to enable easy identification of weld processes, production (welders, their qualifications, date welded), quality (visual inspection, NDT, standards and specifications) and traceability (tracking weld joints and welded castings, the origin of weld materials).

6. Ultrasonic welding of thermoplastics - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_welding_of...

   The materials to be welded experience similar vibrations to those in plunge welding but shorter in time. [3] Hold force to the newly welded region is provided by previously welded section that has come out of the tooling and cooled down. [1] Scan welding is a type of continuous ultrasonic welding in which case large plates or sheets can be ...

7. A Doctor Explains Exactly What Happens To Your Brain During ...

   www.aol.com/doctor-explains-exactly-happens...

   $16.23 at amazon.com. Serotonin promotes a sense of calm, well-being, and happiness. Low serotonin levels can lead to irritability and anxiety, which, along with making you generally cranky, can ...