A rubber stopper is a small, tapered plug used to seal the openings of test tubes, flasks and other laboratory glassware. Stoppers made of cork are also available for this purpose. However, rubber stoppers are preferable for applications that require a tighter seal or a greater degree of chemical resistance.
Without sacrificing product quality, large industry-leading companies require their production output to meet market demands. As a key movement initiator, rollers represent the core of the metal, pulp, paper, printing, tire/rubber, and carpet industry's continuous production mechanism.
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