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when was polypropylene rope invented
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
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Getting hit by PVC (Polyvinyl Chloride) can vary in sensation depending on the thickness, size of the object, and the force behind the impact. PVC is a relatively dense plastic, meaning a blow from a PVC pipe or sheet could feel significantly painful, especially if it impacts sensitive areas such as the shins or elbows. The initial sensation might be a sharp sting followed by throbbing, akin to taking a hard knock from a wooden object. In some cases, depending on the force, bruises, welts, or even more severe injuries could result. However, PVC being a plastic, means it has a degree of flexibility, especially in thinner dimensions, which can somewhat cushion the blow compared to metal or dense wood. Nevertheless, wearing protective gear is advisable in environments where impacts from objects like PVC pipes are possible.
The major structural difference between starch and cellulose lies in the linkage of glucose molecules. Both polymers are composed of glucose, but in starch, glucose units are primarily linked together through alpha-1,4-glycosidic bonds, leading to a structure that can be easily broken down by enzymes in the human digestive system. In contrast, cellulose features beta-1,4-glycosidic bonds, resulting in a straight, rigid structure that cannot be digested by humans. This difference in linkage leads to distinct functional properties: starch serves as a main energy storage molecule in plants, whereas cellulose provides structural support.
To set a PVC card size in Photoshop, begin by launching the program and going to File > New to create a new project. In the New Document setup dialog, you need to enter the dimensions for a standard PVC card, which are 85.6mm in width and 54mm in height. Ensure your resolution is set to 300 pixels/inch for high-quality print output. Under "Color Mode," choose CMYK if the card is for professional printing or RGB for a more general use. Click "Create" to open your new canvas. It's also recommended to add a 3mm bleed around the edge if the card will be professionally cut, making your total document size slightly larger to accommodate this. Remember to save your project settings for future use to streamline your workflow on similar projects.
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