Surgical mesh: Surgical mesh is a loosely woven sheet which is used as either a permanent or temporary support for organs and other tissues during surgery. The meshes are available in both inorganic and biological materials, and are used in a variety of surgeries.Richter's hernia: A Richter's hernia occurs when the antimesenteric wall of the intestine protrudes through a defect in the abdominal wall. This is discrete from other types of abdominal hernias in that only one intestinal wall protrudes through the defect, such that the lumen of the intestine is incompletely contained in the defect, while the rest remains in the peritoneal cavity.Polypropylene drum: The introduction of Polypropylene drums permitted the routine commercial use of a range of highly corrosive chemicals in the tanning industry, for processes such as depilation and bleaching. In spite of the cheapness of the processes the chemicals they require are too aggressive for most practical choices of metal drums.
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