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A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. The most common example is in the head of a tap where the gland is usually packed with string which has been soaked in tallow or similar grease.
A seal is a device or material that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets .
Seal carving, also seal cutting, or zhuanke in Chinese (篆 刻), is a traditional form of art that originated in China and later spread across East Asia. It refers to cutting a design into the bottom face of the seal (the active surface used for stamping, rather than the sides or top).
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Blending is done to create smooth transitions between darker and lighter areas of a drawing. It can also create a shadow effect. Two common methods of blending are, using a finger to rub or spread charcoal which has been applied to the paper or the use of paper blending stumps also called a Tortillon. Many prefer to use a chamois, which is a ...
Özgüç, Nimet. "Seal Impressions from the Palaces at Acemhöyük." In Ancient Art in Seals, edited by Edith Porada, 61-80. Princeton: Princeton University Press, 1980. Özgüç, Nimet. Kültepe-Kaniš/Neša: Seal Impressions on the Clay Envelopes from the Archives of the Native Peruwa and Assyrian Trader Uṣur-Ša-Ištar Son of Aššur-Imittī.
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The typical machine is loaded with a continuous flat roll of plastic film, which has usually had labeling and artwork applied. Plastic is the most commonly used packaging material in the food industry, but the technology can be used to form continuous metallized foil/film, paper, and fabric product containers by changing the edge sealing/seaming methods.