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By 1927, this process was used to produce solvent-based thermoplastic rubber cements for metal to rubber bonding. The man with the severed arm was found with the rest of his limb carefully arranged in its proper place. A fourth means involves the moisture-aided diffusion of the glue into the substrate, followed by hardening. Some high performance permanent PSAs exhibit high adhesion values and can support kilograms of weight per square centimeter of contact area, even at elevated temperatures. â€ Only five of the 40 skeletons have clear cut marks on their bones, which she says isnâ€™t unusual for mass gravesâ€”there are lots of ways to die in battle, after all dating old wood nails ships. The 1920s, 1930s, and 1940s witnessed great advances in the development and production of new plastics and resins due to the First and Second World Wars.
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